Search for charginos nearly mass degenerate with the lightest neutralino in e+e- collisions at centre-of-mass energies up to 209 GeV

A. Heister, S. Schael, R. Barate, R. Brunelière, I. De Bonis, D. Decamp, C. Goy, S. Jezequel, J. P. Lees, F. Martin, E. Merle, M. N. Minard, B. Pietrzyk, B. Trocmé, G. Boix, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. Fernandez & 283 others M. Fernandez-Bosman, L. Garrido, E. Graugés, J. Lopez, M. Martinez, G. Merino, R. Miquel, L. M. Mir, A. Pacheco, D. Paneque, H. Ruiz, A. Colaleo, D. Creanza, N. De Filippis, M. de Palma, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, P. Azzurri, T. Barklow, O. Buchmüller, M. Cattaneo, F. Cerutti, B. Clerbaux, H. Drevermann, R. W. Forty, M. Frank, F. Gianotti, T. C. Greening, J. B. Hansen, J. Harvey, D. E. Hutchcroft, P. Janot, B. Jost, M. Kado, P. Mato, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, G. Sguazzoni, W. Tejessy, F. Teubert, A. Valassi, I. Videau, J. J. Ward, F. Badaud, S. Dessagne, A. Falvard, D. Fayolle, P. Gay, J. Jousset, B. Michel, S. Monteil, D. Pallin, J. M. Pascolo, P. Perret, J. D. Hansen, J. R. Hansen, P. H. Hansen, B. S. Nilsson, A. Kyriakis, C. Markou, E. Simopoulou, A. Vayaki, K. Zachariadou, A. Blondel, J. C. Brient, F. Machefert, A. Rougé, M. Swynghedauw, R. Tanaka, H. Videau, V. Ciulli, E. Focardi, G. Parrini, A. Antonelli, M. Antonelli, G. Bencivenni, F. Bossi, P. Campana, G. Capon, V. Chiarella, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, L. Passalacqua, A. Halley, J. Kennedy, J. G. Lynch, P. Negus, V. O'Shea, A. S. Thompson, S. Wasserbaech, R. Cavanaugh, S. Dhamotharan, C. Geweniger, P. Hanke, V. Hepp, E. E. Kluge, G. Leibenguth, A. Putzer, H. Stenzel, K. Tittel, M. Wunsch, R. Beuselinck, W. Cameron, G. Davies, P. J. Dornan, M. Girone, R. D. Hill, N. Marinelli, J. Nowell, S. A. Rutherford, J. K. Sedgbeer, J. C. Thompson, R. White, V. M. Ghete, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, E. Bouhova-Thacker, C. K. Bowdery, D. P. Clarke, G. Ellis, A. J. Finch, F. Foster, G. Hughes, R. W L Jones, M. R. Pearson, N. A. Robertson, M. Smizanska, O. van der Aa, C. Delaere, V. Lemaitre, U. Blumenschein, F. Hölldorfer, K. Jakobs, F. Kayser, K. Kleinknecht, A. S. Müller, G. Quast, B. Renk, H. G. Sander, S. Schmeling, H. Wachsmuth, C. Zeitnitz, T. Ziegler, A. Bonissent, P. Coyle, C. Curtil, A. Ealet, D. Fouchez, P. Payre, A. Tilquin, F. Ragusa, A. David, H. Dietl, G. Ganis, K. Hüttmann, G. Lütjens, W. Männer, H. G. Moser, R. Settles, G. Wolf, J. Boucrot, O. Callot, M. Davier, L. Duflot, J. F. Grivaz, P. Heusse, A. Jacholkowska, C. Loomis, L. Serin, J. J. Veillet, J. B. de Vivie de Régie, C. Yuan, G. Bagliesi, T. Boccali, L. Foà, A. Giammanco, A. Giassi, F. Ligabue, A. Messineo, F. Palla, G. Sanguinetti, A. Sciabà, R. Tenchini, A. Venturi, P. G. Verdini, O. Awunor, G. A. Blair, G. Cowan, A. Garcia-Bellido, M. G. Green, L. T. Jones, T. Medcalf, A. Misiejuk, J. A. Strong, P. Teixeira-Dias, R. W. Clifft, T. R. Edgecock, P. R. Norton, I. R. Tomalin, B. Bloch-Devaux, D. Boumediene, P. Colas, B. Fabbro, E. Lançon, M. C. Lemaire, E. Locci, P. Perez, J. Rander, J. F. Renardy, A. Rosowsky, P. Seager, A. Trabelsi, B. Tuchming, B. Vallage, N. Konstantinidis, A. M. Litke, G. Taylor, C. N. Booth, S. Cartwright, F. Combley, P. N. Hodgson, M. Lehto, L. F. Thompson, K. Affholderbach, A. Böhrer, S. Brandt, C. Grupen, J. Hess, A. Ngac, G. Prange, U. Sieler, C. Borean, G. Giannini, H. He, J. Putz, J. Rothberg, S. R. Armstrong, K. Berkelman, K. Cranmer, D. P S Ferguson, Y. Gao, S. González, O. J. Hayes, H. Hu, S. Jin, J. Kile, P. A. McNamara, J. Nielsen, Y. B. Pan, J. H. von Wimmersperg-Toeller, W. Wiedenmann, J. Wu, S. L. Wu, X. Wu, G. Zobernig, G. Dissertori

    Research output: Contribution to journalArticle

    Abstract

    A search for charginos nearly mass degenerate with the lightest neutralino is performed with the data collected by the ALEPH detector at LEP, at centre-of-mass energies between 189 and 209 GeV, corresponding to an integrated luminosity of 628 pb-1. The analysis is based on the detection of isolated and energetic initial state radiation photons, produced in association with chargino pairs whose decay products have little visible energy. The number of candidate events observed is in agreement with that expected from Standard Model background sources. These results are combined with those of other direct searches for charginos, and a lower limit of 88 GeV/c2 at 95% confidence level is derived for the chargino mass in the case of heavy sfermions, irrespective of the chargino-neutralino mass difference.

    Original languageEnglish (US)
    Pages (from-to)223-236
    Number of pages14
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume533
    Issue number3-4
    DOIs
    StatePublished - May 9 2002

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    center of mass
    collisions
    energy
    confidence
    luminosity
    detectors
    photons
    decay
    radiation
    products

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Search for charginos nearly mass degenerate with the lightest neutralino in e+e- collisions at centre-of-mass energies up to 209 GeV. / Heister, A.; Schael, S.; Barate, R.; Brunelière, R.; De Bonis, I.; Decamp, D.; Goy, C.; Jezequel, S.; Lees, J. P.; Martin, F.; Merle, E.; Minard, M. N.; Pietrzyk, B.; Trocmé, B.; Boix, G.; Bravo, S.; Casado, M. P.; Chmeissani, M.; Crespo, J. M.; Fernandez, E.; Fernandez-Bosman, M.; Garrido, L.; Graugés, E.; Lopez, J.; Martinez, M.; Merino, G.; Miquel, R.; Mir, L. M.; Pacheco, A.; Paneque, D.; Ruiz, H.; Colaleo, A.; Creanza, D.; De Filippis, N.; de Palma, M.; Iaselli, G.; Maggi, G.; Maggi, M.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X.; Lin, J.; Ouyang, Q.; Wang, T.; Xie, Y.; Xu, R.; Xue, S.; Zhang, J.; Zhang, L.; Zhao, W.; Abbaneo, D.; Azzurri, P.; Barklow, T.; Buchmüller, O.; Cattaneo, M.; Cerutti, F.; Clerbaux, B.; Drevermann, H.; Forty, R. W.; Frank, M.; Gianotti, F.; Greening, T. C.; Hansen, J. B.; Harvey, J.; Hutchcroft, D. E.; Janot, P.; Jost, B.; Kado, M.; Mato, P.; Moutoussi, A.; Ranjard, F.; Rolandi, L.; Schlatter, D.; Sguazzoni, G.; Tejessy, W.; Teubert, F.; Valassi, A.; Videau, I.; Ward, J. J.; Badaud, F.; Dessagne, S.; Falvard, A.; Fayolle, D.; Gay, P.; Jousset, J.; Michel, B.; Monteil, S.; Pallin, D.; Pascolo, J. M.; Perret, P.; Hansen, J. D.; Hansen, J. R.; Hansen, P. H.; Nilsson, B. S.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Zachariadou, K.; Blondel, A.; Brient, J. C.; Machefert, F.; Rougé, A.; Swynghedauw, M.; Tanaka, R.; Videau, H.; Ciulli, V.; Focardi, E.; Parrini, G.; Antonelli, A.; Antonelli, M.; Bencivenni, G.; Bossi, F.; Campana, P.; Capon, G.; Chiarella, V.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, G. P.; Passalacqua, L.; Halley, A.; Kennedy, J.; Lynch, J. G.; Negus, P.; O'Shea, V.; Thompson, A. S.; Wasserbaech, S.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E. E.; Leibenguth, G.; Putzer, A.; Stenzel, H.; Tittel, K.; Wunsch, M.; Beuselinck, R.; Cameron, W.; Davies, G.; Dornan, P. J.; Girone, M.; Hill, R. D.; Marinelli, N.; Nowell, J.; Rutherford, S. A.; Sedgbeer, J. K.; Thompson, J. C.; White, R.; Ghete, V. M.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bouhova-Thacker, E.; Bowdery, C. K.; Clarke, D. P.; Ellis, G.; Finch, A. J.; Foster, F.; Hughes, G.; Jones, R. W L; Pearson, M. R.; Robertson, N. A.; Smizanska, M.; van der Aa, O.; Delaere, C.; Lemaitre, V.; Blumenschein, U.; Hölldorfer, F.; Jakobs, K.; Kayser, F.; Kleinknecht, K.; Müller, A. S.; Quast, G.; Renk, B.; Sander, H. G.; Schmeling, S.; Wachsmuth, H.; Zeitnitz, C.; Ziegler, T.; Bonissent, A.; Coyle, P.; Curtil, C.; Ealet, A.; Fouchez, D.; Payre, P.; Tilquin, A.; Ragusa, F.; David, A.; Dietl, H.; Ganis, G.; Hüttmann, K.; Lütjens, G.; Männer, W.; Moser, H. G.; Settles, R.; Wolf, G.; Boucrot, J.; Callot, O.; Davier, M.; Duflot, L.; Grivaz, J. F.; Heusse, P.; Jacholkowska, A.; Loomis, C.; Serin, L.; Veillet, J. J.; de Vivie de Régie, J. B.; Yuan, C.; Bagliesi, G.; Boccali, T.; Foà, L.; Giammanco, A.; Giassi, A.; Ligabue, F.; Messineo, A.; Palla, F.; Sanguinetti, G.; Sciabà, A.; Tenchini, R.; Venturi, A.; Verdini, P. G.; Awunor, O.; Blair, G. A.; Cowan, G.; Garcia-Bellido, A.; Green, M. G.; Jones, L. T.; Medcalf, T.; Misiejuk, A.; Strong, J. A.; Teixeira-Dias, P.; Clifft, R. W.; Edgecock, T. R.; Norton, P. R.; Tomalin, I. R.; Bloch-Devaux, B.; Boumediene, D.; Colas, P.; Fabbro, B.; Lançon, E.; Lemaire, M. C.; Locci, E.; Perez, P.; Rander, J.; Renardy, J. F.; Rosowsky, A.; Seager, P.; Trabelsi, A.; Tuchming, B.; Vallage, B.; Konstantinidis, N.; Litke, A. M.; Taylor, G.; Booth, C. N.; Cartwright, S.; Combley, F.; Hodgson, P. N.; Lehto, M.; Thompson, L. F.; Affholderbach, K.; Böhrer, A.; Brandt, S.; Grupen, C.; Hess, J.; Ngac, A.; Prange, G.; Sieler, U.; Borean, C.; Giannini, G.; He, H.; Putz, J.; Rothberg, J.; Armstrong, S. R.; Berkelman, K.; Cranmer, K.; Ferguson, D. P S; Gao, Y.; González, S.; Hayes, O. J.; Hu, H.; Jin, S.; Kile, J.; McNamara, P. A.; Nielsen, J.; Pan, Y. B.; von Wimmersperg-Toeller, J. H.; Wiedenmann, W.; Wu, J.; Wu, S. L.; Wu, X.; Zobernig, G.; Dissertori, G.

    In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 533, No. 3-4, 09.05.2002, p. 223-236.

    Research output: Contribution to journalArticle

    Heister, A, Schael, S, Barate, R, Brunelière, R, De Bonis, I, Decamp, D, Goy, C, Jezequel, S, Lees, JP, Martin, F, Merle, E, Minard, MN, Pietrzyk, B, Trocmé, B, Boix, G, Bravo, S, Casado, MP, Chmeissani, M, Crespo, JM, Fernandez, E, Fernandez-Bosman, M, Garrido, L, Graugés, E, Lopez, J, Martinez, M, Merino, G, Miquel, R, Mir, LM, Pacheco, A, Paneque, D, Ruiz, H, Colaleo, A, Creanza, D, De Filippis, N, de Palma, M, Iaselli, G, Maggi, G, Maggi, M, Nuzzo, S, Ranieri, A, Raso, G, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Tricomi, A, Zito, G, Huang, X, Lin, J, Ouyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Abbaneo, D, Azzurri, P, Barklow, T, Buchmüller, O, Cattaneo, M, Cerutti, F, Clerbaux, B, Drevermann, H, Forty, RW, Frank, M, Gianotti, F, Greening, TC, Hansen, JB, Harvey, J, Hutchcroft, DE, Janot, P, Jost, B, Kado, M, Mato, P, Moutoussi, A, Ranjard, F, Rolandi, L, Schlatter, D, Sguazzoni, G, Tejessy, W, Teubert, F, Valassi, A, Videau, I, Ward, JJ, Badaud, F, Dessagne, S, Falvard, A, Fayolle, D, Gay, P, Jousset, J, Michel, B, Monteil, S, Pallin, D, Pascolo, JM, Perret, P, Hansen, JD, Hansen, JR, Hansen, PH, Nilsson, BS, Kyriakis, A, Markou, C, Simopoulou, E, Vayaki, A, Zachariadou, K, Blondel, A, Brient, JC, Machefert, F, Rougé, A, Swynghedauw, M, Tanaka, R, Videau, H, Ciulli, V, Focardi, E, Parrini, G, Antonelli, A, Antonelli, M, Bencivenni, G, Bossi, F, Campana, P, Capon, G, Chiarella, V, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, GP, Passalacqua, L, Halley, A, Kennedy, J, Lynch, JG, Negus, P, O'Shea, V, Thompson, AS, Wasserbaech, S, Cavanaugh, R, Dhamotharan, S, Geweniger, C, Hanke, P, Hepp, V, Kluge, EE, Leibenguth, G, Putzer, A, Stenzel, H, Tittel, K, Wunsch, M, Beuselinck, R, Cameron, W, Davies, G, Dornan, PJ, Girone, M, Hill, RD, Marinelli, N, Nowell, J, Rutherford, SA, Sedgbeer, JK, Thompson, JC, White, R, Ghete, VM, Girtler, P, Kneringer, E, Kuhn, D, Rudolph, G, Bouhova-Thacker, E, Bowdery, CK, Clarke, DP, Ellis, G, Finch, AJ, Foster, F, Hughes, G, Jones, RWL, Pearson, MR, Robertson, NA, Smizanska, M, van der Aa, O, Delaere, C, Lemaitre, V, Blumenschein, U, Hölldorfer, F, Jakobs, K, Kayser, F, Kleinknecht, K, Müller, AS, Quast, G, Renk, B, Sander, HG, Schmeling, S, Wachsmuth, H, Zeitnitz, C, Ziegler, T, Bonissent, A, Coyle, P, Curtil, C, Ealet, A, Fouchez, D, Payre, P, Tilquin, A, Ragusa, F, David, A, Dietl, H, Ganis, G, Hüttmann, K, Lütjens, G, Männer, W, Moser, HG, Settles, R, Wolf, G, Boucrot, J, Callot, O, Davier, M, Duflot, L, Grivaz, JF, Heusse, P, Jacholkowska, A, Loomis, C, Serin, L, Veillet, JJ, de Vivie de Régie, JB, Yuan, C, Bagliesi, G, Boccali, T, Foà, L, Giammanco, A, Giassi, A, Ligabue, F, Messineo, A, Palla, F, Sanguinetti, G, Sciabà, A, Tenchini, R, Venturi, A, Verdini, PG, Awunor, O, Blair, GA, Cowan, G, Garcia-Bellido, A, Green, MG, Jones, LT, Medcalf, T, Misiejuk, A, Strong, JA, Teixeira-Dias, P, Clifft, RW, Edgecock, TR, Norton, PR, Tomalin, IR, Bloch-Devaux, B, Boumediene, D, Colas, P, Fabbro, B, Lançon, E, Lemaire, MC, Locci, E, Perez, P, Rander, J, Renardy, JF, Rosowsky, A, Seager, P, Trabelsi, A, Tuchming, B, Vallage, B, Konstantinidis, N, Litke, AM, Taylor, G, Booth, CN, Cartwright, S, Combley, F, Hodgson, PN, Lehto, M, Thompson, LF, Affholderbach, K, Böhrer, A, Brandt, S, Grupen, C, Hess, J, Ngac, A, Prange, G, Sieler, U, Borean, C, Giannini, G, He, H, Putz, J, Rothberg, J, Armstrong, SR, Berkelman, K, Cranmer, K, Ferguson, DPS, Gao, Y, González, S, Hayes, OJ, Hu, H, Jin, S, Kile, J, McNamara, PA, Nielsen, J, Pan, YB, von Wimmersperg-Toeller, JH, Wiedenmann, W, Wu, J, Wu, SL, Wu, X, Zobernig, G & Dissertori, G 2002, 'Search for charginos nearly mass degenerate with the lightest neutralino in e+e- collisions at centre-of-mass energies up to 209 GeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 533, no. 3-4, pp. 223-236. https://doi.org/10.1016/S0370-2693(02)01584-8
    Heister, A. ; Schael, S. ; Barate, R. ; Brunelière, R. ; De Bonis, I. ; Decamp, D. ; Goy, C. ; Jezequel, S. ; Lees, J. P. ; Martin, F. ; Merle, E. ; Minard, M. N. ; Pietrzyk, B. ; Trocmé, B. ; Boix, G. ; Bravo, S. ; Casado, M. P. ; Chmeissani, M. ; Crespo, J. M. ; Fernandez, E. ; Fernandez-Bosman, M. ; Garrido, L. ; Graugés, E. ; Lopez, J. ; Martinez, M. ; Merino, G. ; Miquel, R. ; Mir, L. M. ; Pacheco, A. ; Paneque, D. ; Ruiz, H. ; Colaleo, A. ; Creanza, D. ; De Filippis, N. ; de Palma, M. ; Iaselli, G. ; Maggi, G. ; Maggi, M. ; Nuzzo, S. ; Ranieri, A. ; Raso, G. ; Ruggieri, F. ; Selvaggi, G. ; Silvestris, L. ; Tempesta, P. ; Tricomi, A. ; Zito, G. ; Huang, X. ; Lin, J. ; Ouyang, Q. ; Wang, T. ; Xie, Y. ; Xu, R. ; Xue, S. ; Zhang, J. ; Zhang, L. ; Zhao, W. ; Abbaneo, D. ; Azzurri, P. ; Barklow, T. ; Buchmüller, O. ; Cattaneo, M. ; Cerutti, F. ; Clerbaux, B. ; Drevermann, H. ; Forty, R. W. ; Frank, M. ; Gianotti, F. ; Greening, T. C. ; Hansen, J. B. ; Harvey, J. ; Hutchcroft, D. E. ; Janot, P. ; Jost, B. ; Kado, M. ; Mato, P. ; Moutoussi, A. ; Ranjard, F. ; Rolandi, L. ; Schlatter, D. ; Sguazzoni, G. ; Tejessy, W. ; Teubert, F. ; Valassi, A. ; Videau, I. ; Ward, J. J. ; Badaud, F. ; Dessagne, S. ; Falvard, A. ; Fayolle, D. ; Gay, P. ; Jousset, J. ; Michel, B. ; Monteil, S. ; Pallin, D. ; Pascolo, J. M. ; Perret, P. ; Hansen, J. D. ; Hansen, J. R. ; Hansen, P. H. ; Nilsson, B. S. ; Kyriakis, A. ; Markou, C. ; Simopoulou, E. ; Vayaki, A. ; Zachariadou, K. ; Blondel, A. ; Brient, J. C. ; Machefert, F. ; Rougé, A. ; Swynghedauw, M. ; Tanaka, R. ; Videau, H. ; Ciulli, V. ; Focardi, E. ; Parrini, G. ; Antonelli, A. ; Antonelli, M. ; Bencivenni, G. ; Bossi, F. ; Campana, P. ; Capon, G. ; Chiarella, V. ; Laurelli, P. ; Mannocchi, G. ; Murtas, F. ; Murtas, G. P. ; Passalacqua, L. ; Halley, A. ; Kennedy, J. ; Lynch, J. G. ; Negus, P. ; O'Shea, V. ; Thompson, A. S. ; Wasserbaech, S. ; Cavanaugh, R. ; Dhamotharan, S. ; Geweniger, C. ; Hanke, P. ; Hepp, V. ; Kluge, E. E. ; Leibenguth, G. ; Putzer, A. ; Stenzel, H. ; Tittel, K. ; Wunsch, M. ; Beuselinck, R. ; Cameron, W. ; Davies, G. ; Dornan, P. J. ; Girone, M. ; Hill, R. D. ; Marinelli, N. ; Nowell, J. ; Rutherford, S. A. ; Sedgbeer, J. K. ; Thompson, J. C. ; White, R. ; Ghete, V. M. ; Girtler, P. ; Kneringer, E. ; Kuhn, D. ; Rudolph, G. ; Bouhova-Thacker, E. ; Bowdery, C. K. ; Clarke, D. P. ; Ellis, G. ; Finch, A. J. ; Foster, F. ; Hughes, G. ; Jones, R. W L ; Pearson, M. R. ; Robertson, N. A. ; Smizanska, M. ; van der Aa, O. ; Delaere, C. ; Lemaitre, V. ; Blumenschein, U. ; Hölldorfer, F. ; Jakobs, K. ; Kayser, F. ; Kleinknecht, K. ; Müller, A. S. ; Quast, G. ; Renk, B. ; Sander, H. G. ; Schmeling, S. ; Wachsmuth, H. ; Zeitnitz, C. ; Ziegler, T. ; Bonissent, A. ; Coyle, P. ; Curtil, C. ; Ealet, A. ; Fouchez, D. ; Payre, P. ; Tilquin, A. ; Ragusa, F. ; David, A. ; Dietl, H. ; Ganis, G. ; Hüttmann, K. ; Lütjens, G. ; Männer, W. ; Moser, H. G. ; Settles, R. ; Wolf, G. ; Boucrot, J. ; Callot, O. ; Davier, M. ; Duflot, L. ; Grivaz, J. F. ; Heusse, P. ; Jacholkowska, A. ; Loomis, C. ; Serin, L. ; Veillet, J. J. ; de Vivie de Régie, J. B. ; Yuan, C. ; Bagliesi, G. ; Boccali, T. ; Foà, L. ; Giammanco, A. ; Giassi, A. ; Ligabue, F. ; Messineo, A. ; Palla, F. ; Sanguinetti, G. ; Sciabà, A. ; Tenchini, R. ; Venturi, A. ; Verdini, P. G. ; Awunor, O. ; Blair, G. A. ; Cowan, G. ; Garcia-Bellido, A. ; Green, M. G. ; Jones, L. T. ; Medcalf, T. ; Misiejuk, A. ; Strong, J. A. ; Teixeira-Dias, P. ; Clifft, R. W. ; Edgecock, T. R. ; Norton, P. R. ; Tomalin, I. R. ; Bloch-Devaux, B. ; Boumediene, D. ; Colas, P. ; Fabbro, B. ; Lançon, E. ; Lemaire, M. C. ; Locci, E. ; Perez, P. ; Rander, J. ; Renardy, J. F. ; Rosowsky, A. ; Seager, P. ; Trabelsi, A. ; Tuchming, B. ; Vallage, B. ; Konstantinidis, N. ; Litke, A. M. ; Taylor, G. ; Booth, C. N. ; Cartwright, S. ; Combley, F. ; Hodgson, P. N. ; Lehto, M. ; Thompson, L. F. ; Affholderbach, K. ; Böhrer, A. ; Brandt, S. ; Grupen, C. ; Hess, J. ; Ngac, A. ; Prange, G. ; Sieler, U. ; Borean, C. ; Giannini, G. ; He, H. ; Putz, J. ; Rothberg, J. ; Armstrong, S. R. ; Berkelman, K. ; Cranmer, K. ; Ferguson, D. P S ; Gao, Y. ; González, S. ; Hayes, O. J. ; Hu, H. ; Jin, S. ; Kile, J. ; McNamara, P. A. ; Nielsen, J. ; Pan, Y. B. ; von Wimmersperg-Toeller, J. H. ; Wiedenmann, W. ; Wu, J. ; Wu, S. L. ; Wu, X. ; Zobernig, G. ; Dissertori, G. / Search for charginos nearly mass degenerate with the lightest neutralino in e+e- collisions at centre-of-mass energies up to 209 GeV. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2002 ; Vol. 533, No. 3-4. pp. 223-236.
    @article{24ef9541f17e45ab848801c006dfcdb6,
    title = "Search for charginos nearly mass degenerate with the lightest neutralino in e+e- collisions at centre-of-mass energies up to 209 GeV",
    abstract = "A search for charginos nearly mass degenerate with the lightest neutralino is performed with the data collected by the ALEPH detector at LEP, at centre-of-mass energies between 189 and 209 GeV, corresponding to an integrated luminosity of 628 pb-1. The analysis is based on the detection of isolated and energetic initial state radiation photons, produced in association with chargino pairs whose decay products have little visible energy. The number of candidate events observed is in agreement with that expected from Standard Model background sources. These results are combined with those of other direct searches for charginos, and a lower limit of 88 GeV/c2 at 95{\%} confidence level is derived for the chargino mass in the case of heavy sfermions, irrespective of the chargino-neutralino mass difference.",
    author = "A. Heister and S. Schael and R. Barate and R. Bruneli{\`e}re and {De Bonis}, I. and D. Decamp and C. Goy and S. Jezequel and Lees, {J. P.} and F. Martin and E. Merle and Minard, {M. N.} and B. Pietrzyk and B. Trocm{\'e} and G. Boix and S. Bravo and Casado, {M. P.} and M. Chmeissani and Crespo, {J. M.} and E. Fernandez and M. Fernandez-Bosman and L. Garrido and E. Graug{\'e}s and J. Lopez and M. Martinez and G. Merino and R. Miquel and Mir, {L. M.} and A. Pacheco and D. Paneque and H. Ruiz and A. Colaleo and D. Creanza and {De Filippis}, N. and {de Palma}, M. and G. Iaselli and G. Maggi and M. Maggi and S. Nuzzo and A. Ranieri and G. Raso and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and A. Tricomi and G. Zito and X. Huang and J. Lin and Q. Ouyang and T. Wang and Y. Xie and R. Xu and S. Xue and J. Zhang and L. Zhang and W. Zhao and D. Abbaneo and P. Azzurri and T. Barklow and O. Buchm{\"u}ller and M. Cattaneo and F. Cerutti and B. Clerbaux and H. Drevermann and Forty, {R. W.} and M. Frank and F. Gianotti and Greening, {T. C.} and Hansen, {J. B.} and J. Harvey and Hutchcroft, {D. E.} and P. Janot and B. Jost and M. Kado and P. Mato and A. Moutoussi and F. Ranjard and L. Rolandi and D. Schlatter and G. Sguazzoni and W. Tejessy and F. Teubert and A. Valassi and I. Videau and Ward, {J. J.} and F. Badaud and S. Dessagne and A. Falvard and D. Fayolle and P. Gay and J. Jousset and B. Michel and S. Monteil and D. Pallin and Pascolo, {J. M.} and P. Perret and Hansen, {J. D.} and Hansen, {J. R.} and Hansen, {P. H.} and Nilsson, {B. S.} and A. Kyriakis and C. Markou and E. Simopoulou and A. Vayaki and K. Zachariadou and A. Blondel and Brient, {J. C.} and F. Machefert and A. Roug{\'e} and M. Swynghedauw and R. Tanaka and H. Videau and V. Ciulli and E. Focardi and G. Parrini and A. Antonelli and M. Antonelli and G. Bencivenni and F. Bossi and P. Campana and G. Capon and V. Chiarella and P. Laurelli and G. Mannocchi and F. Murtas and Murtas, {G. P.} and L. Passalacqua and A. Halley and J. Kennedy and Lynch, {J. G.} and P. Negus and V. O'Shea and Thompson, {A. S.} and S. Wasserbaech and R. Cavanaugh and S. Dhamotharan and C. Geweniger and P. Hanke and V. Hepp and Kluge, {E. E.} and G. Leibenguth and A. Putzer and H. Stenzel and K. Tittel and M. Wunsch and R. Beuselinck and W. Cameron and G. Davies and Dornan, {P. J.} and M. Girone and Hill, {R. D.} and N. Marinelli and J. Nowell and Rutherford, {S. A.} and Sedgbeer, {J. K.} and Thompson, {J. C.} and R. White and Ghete, {V. M.} and P. Girtler and E. Kneringer and D. Kuhn and G. Rudolph and E. Bouhova-Thacker and Bowdery, {C. K.} and Clarke, {D. P.} and G. Ellis and Finch, {A. J.} and F. Foster and G. Hughes and Jones, {R. W L} and Pearson, {M. R.} and Robertson, {N. A.} and M. Smizanska and {van der Aa}, O. and C. Delaere and V. Lemaitre and U. Blumenschein and F. H{\"o}lldorfer and K. Jakobs and F. Kayser and K. Kleinknecht and M{\"u}ller, {A. S.} and G. Quast and B. Renk and Sander, {H. G.} and S. Schmeling and H. Wachsmuth and C. Zeitnitz and T. Ziegler and A. Bonissent and P. Coyle and C. Curtil and A. Ealet and D. Fouchez and P. Payre and A. Tilquin and F. Ragusa and A. David and H. Dietl and G. Ganis and K. H{\"u}ttmann and G. L{\"u}tjens and W. M{\"a}nner and Moser, {H. G.} and R. Settles and G. Wolf and J. Boucrot and O. Callot and M. Davier and L. Duflot and Grivaz, {J. F.} and P. Heusse and A. Jacholkowska and C. Loomis and L. Serin and Veillet, {J. J.} and {de Vivie de R{\'e}gie}, {J. B.} and C. Yuan and G. Bagliesi and T. Boccali and L. Fo{\`a} and A. Giammanco and A. Giassi and F. Ligabue and A. Messineo and F. Palla and G. Sanguinetti and A. Sciab{\`a} and R. Tenchini and A. Venturi and Verdini, {P. G.} and O. Awunor and Blair, {G. A.} and G. Cowan and A. Garcia-Bellido and Green, {M. G.} and Jones, {L. T.} and T. Medcalf and A. Misiejuk and Strong, {J. A.} and P. Teixeira-Dias and Clifft, {R. W.} and Edgecock, {T. R.} and Norton, {P. R.} and Tomalin, {I. R.} and B. Bloch-Devaux and D. Boumediene and P. Colas and B. Fabbro and E. Lan{\cc}on and Lemaire, {M. C.} and E. Locci and P. Perez and J. Rander and Renardy, {J. F.} and A. Rosowsky and P. Seager and A. Trabelsi and B. Tuchming and B. Vallage and N. Konstantinidis and Litke, {A. M.} and G. Taylor and Booth, {C. N.} and S. Cartwright and F. Combley and Hodgson, {P. N.} and M. Lehto and Thompson, {L. F.} and K. Affholderbach and A. B{\"o}hrer and S. Brandt and C. Grupen and J. Hess and A. Ngac and G. Prange and U. Sieler and C. Borean and G. Giannini and H. He and J. Putz and J. Rothberg and Armstrong, {S. R.} and K. Berkelman and K. Cranmer and Ferguson, {D. P S} and Y. Gao and S. Gonz{\'a}lez and Hayes, {O. J.} and H. Hu and S. Jin and J. Kile and McNamara, {P. A.} and J. Nielsen and Pan, {Y. B.} and {von Wimmersperg-Toeller}, {J. H.} and W. Wiedenmann and J. Wu and Wu, {S. L.} and X. Wu and G. Zobernig and G. Dissertori",
    year = "2002",
    month = "5",
    day = "9",
    doi = "10.1016/S0370-2693(02)01584-8",
    language = "English (US)",
    volume = "533",
    pages = "223--236",
    journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
    issn = "0370-2693",
    publisher = "Elsevier",
    number = "3-4",

    }

    TY - JOUR

    T1 - Search for charginos nearly mass degenerate with the lightest neutralino in e+e- collisions at centre-of-mass energies up to 209 GeV

    AU - Heister, A.

    AU - Schael, S.

    AU - Barate, R.

    AU - Brunelière, R.

    AU - De Bonis, I.

    AU - Decamp, D.

    AU - Goy, C.

    AU - Jezequel, S.

    AU - Lees, J. P.

    AU - Martin, F.

    AU - Merle, E.

    AU - Minard, M. N.

    AU - Pietrzyk, B.

    AU - Trocmé, B.

    AU - Boix, G.

    AU - Bravo, S.

    AU - Casado, M. P.

    AU - Chmeissani, M.

    AU - Crespo, J. M.

    AU - Fernandez, E.

    AU - Fernandez-Bosman, M.

    AU - Garrido, L.

    AU - Graugés, E.

    AU - Lopez, J.

    AU - Martinez, M.

    AU - Merino, G.

    AU - Miquel, R.

    AU - Mir, L. M.

    AU - Pacheco, A.

    AU - Paneque, D.

    AU - Ruiz, H.

    AU - Colaleo, A.

    AU - Creanza, D.

    AU - De Filippis, N.

    AU - de Palma, M.

    AU - Iaselli, G.

    AU - Maggi, G.

    AU - Maggi, M.

    AU - Nuzzo, S.

    AU - Ranieri, A.

    AU - Raso, G.

    AU - Ruggieri, F.

    AU - Selvaggi, G.

    AU - Silvestris, L.

    AU - Tempesta, P.

    AU - Tricomi, A.

    AU - Zito, G.

    AU - Huang, X.

    AU - Lin, J.

    AU - Ouyang, Q.

    AU - Wang, T.

    AU - Xie, Y.

    AU - Xu, R.

    AU - Xue, S.

    AU - Zhang, J.

    AU - Zhang, L.

    AU - Zhao, W.

    AU - Abbaneo, D.

    AU - Azzurri, P.

    AU - Barklow, T.

    AU - Buchmüller, O.

    AU - Cattaneo, M.

    AU - Cerutti, F.

    AU - Clerbaux, B.

    AU - Drevermann, H.

    AU - Forty, R. W.

    AU - Frank, M.

    AU - Gianotti, F.

    AU - Greening, T. C.

    AU - Hansen, J. B.

    AU - Harvey, J.

    AU - Hutchcroft, D. E.

    AU - Janot, P.

    AU - Jost, B.

    AU - Kado, M.

    AU - Mato, P.

    AU - Moutoussi, A.

    AU - Ranjard, F.

    AU - Rolandi, L.

    AU - Schlatter, D.

    AU - Sguazzoni, G.

    AU - Tejessy, W.

    AU - Teubert, F.

    AU - Valassi, A.

    AU - Videau, I.

    AU - Ward, J. J.

    AU - Badaud, F.

    AU - Dessagne, S.

    AU - Falvard, A.

    AU - Fayolle, D.

    AU - Gay, P.

    AU - Jousset, J.

    AU - Michel, B.

    AU - Monteil, S.

    AU - Pallin, D.

    AU - Pascolo, J. M.

    AU - Perret, P.

    AU - Hansen, J. D.

    AU - Hansen, J. R.

    AU - Hansen, P. H.

    AU - Nilsson, B. S.

    AU - Kyriakis, A.

    AU - Markou, C.

    AU - Simopoulou, E.

    AU - Vayaki, A.

    AU - Zachariadou, K.

    AU - Blondel, A.

    AU - Brient, J. C.

    AU - Machefert, F.

    AU - Rougé, A.

    AU - Swynghedauw, M.

    AU - Tanaka, R.

    AU - Videau, H.

    AU - Ciulli, V.

    AU - Focardi, E.

    AU - Parrini, G.

    AU - Antonelli, A.

    AU - Antonelli, M.

    AU - Bencivenni, G.

    AU - Bossi, F.

    AU - Campana, P.

    AU - Capon, G.

    AU - Chiarella, V.

    AU - Laurelli, P.

    AU - Mannocchi, G.

    AU - Murtas, F.

    AU - Murtas, G. P.

    AU - Passalacqua, L.

    AU - Halley, A.

    AU - Kennedy, J.

    AU - Lynch, J. G.

    AU - Negus, P.

    AU - O'Shea, V.

    AU - Thompson, A. S.

    AU - Wasserbaech, S.

    AU - Cavanaugh, R.

    AU - Dhamotharan, S.

    AU - Geweniger, C.

    AU - Hanke, P.

    AU - Hepp, V.

    AU - Kluge, E. E.

    AU - Leibenguth, G.

    AU - Putzer, A.

    AU - Stenzel, H.

    AU - Tittel, K.

    AU - Wunsch, M.

    AU - Beuselinck, R.

    AU - Cameron, W.

    AU - Davies, G.

    AU - Dornan, P. J.

    AU - Girone, M.

    AU - Hill, R. D.

    AU - Marinelli, N.

    AU - Nowell, J.

    AU - Rutherford, S. A.

    AU - Sedgbeer, J. K.

    AU - Thompson, J. C.

    AU - White, R.

    AU - Ghete, V. M.

    AU - Girtler, P.

    AU - Kneringer, E.

    AU - Kuhn, D.

    AU - Rudolph, G.

    AU - Bouhova-Thacker, E.

    AU - Bowdery, C. K.

    AU - Clarke, D. P.

    AU - Ellis, G.

    AU - Finch, A. J.

    AU - Foster, F.

    AU - Hughes, G.

    AU - Jones, R. W L

    AU - Pearson, M. R.

    AU - Robertson, N. A.

    AU - Smizanska, M.

    AU - van der Aa, O.

    AU - Delaere, C.

    AU - Lemaitre, V.

    AU - Blumenschein, U.

    AU - Hölldorfer, F.

    AU - Jakobs, K.

    AU - Kayser, F.

    AU - Kleinknecht, K.

    AU - Müller, A. S.

    AU - Quast, G.

    AU - Renk, B.

    AU - Sander, H. G.

    AU - Schmeling, S.

    AU - Wachsmuth, H.

    AU - Zeitnitz, C.

    AU - Ziegler, T.

    AU - Bonissent, A.

    AU - Coyle, P.

    AU - Curtil, C.

    AU - Ealet, A.

    AU - Fouchez, D.

    AU - Payre, P.

    AU - Tilquin, A.

    AU - Ragusa, F.

    AU - David, A.

    AU - Dietl, H.

    AU - Ganis, G.

    AU - Hüttmann, K.

    AU - Lütjens, G.

    AU - Männer, W.

    AU - Moser, H. G.

    AU - Settles, R.

    AU - Wolf, G.

    AU - Boucrot, J.

    AU - Callot, O.

    AU - Davier, M.

    AU - Duflot, L.

    AU - Grivaz, J. F.

    AU - Heusse, P.

    AU - Jacholkowska, A.

    AU - Loomis, C.

    AU - Serin, L.

    AU - Veillet, J. J.

    AU - de Vivie de Régie, J. B.

    AU - Yuan, C.

    AU - Bagliesi, G.

    AU - Boccali, T.

    AU - Foà, L.

    AU - Giammanco, A.

    AU - Giassi, A.

    AU - Ligabue, F.

    AU - Messineo, A.

    AU - Palla, F.

    AU - Sanguinetti, G.

    AU - Sciabà, A.

    AU - Tenchini, R.

    AU - Venturi, A.

    AU - Verdini, P. G.

    AU - Awunor, O.

    AU - Blair, G. A.

    AU - Cowan, G.

    AU - Garcia-Bellido, A.

    AU - Green, M. G.

    AU - Jones, L. T.

    AU - Medcalf, T.

    AU - Misiejuk, A.

    AU - Strong, J. A.

    AU - Teixeira-Dias, P.

    AU - Clifft, R. W.

    AU - Edgecock, T. R.

    AU - Norton, P. R.

    AU - Tomalin, I. R.

    AU - Bloch-Devaux, B.

    AU - Boumediene, D.

    AU - Colas, P.

    AU - Fabbro, B.

    AU - Lançon, E.

    AU - Lemaire, M. C.

    AU - Locci, E.

    AU - Perez, P.

    AU - Rander, J.

    AU - Renardy, J. F.

    AU - Rosowsky, A.

    AU - Seager, P.

    AU - Trabelsi, A.

    AU - Tuchming, B.

    AU - Vallage, B.

    AU - Konstantinidis, N.

    AU - Litke, A. M.

    AU - Taylor, G.

    AU - Booth, C. N.

    AU - Cartwright, S.

    AU - Combley, F.

    AU - Hodgson, P. N.

    AU - Lehto, M.

    AU - Thompson, L. F.

    AU - Affholderbach, K.

    AU - Böhrer, A.

    AU - Brandt, S.

    AU - Grupen, C.

    AU - Hess, J.

    AU - Ngac, A.

    AU - Prange, G.

    AU - Sieler, U.

    AU - Borean, C.

    AU - Giannini, G.

    AU - He, H.

    AU - Putz, J.

    AU - Rothberg, J.

    AU - Armstrong, S. R.

    AU - Berkelman, K.

    AU - Cranmer, K.

    AU - Ferguson, D. P S

    AU - Gao, Y.

    AU - González, S.

    AU - Hayes, O. J.

    AU - Hu, H.

    AU - Jin, S.

    AU - Kile, J.

    AU - McNamara, P. A.

    AU - Nielsen, J.

    AU - Pan, Y. B.

    AU - von Wimmersperg-Toeller, J. H.

    AU - Wiedenmann, W.

    AU - Wu, J.

    AU - Wu, S. L.

    AU - Wu, X.

    AU - Zobernig, G.

    AU - Dissertori, G.

    PY - 2002/5/9

    Y1 - 2002/5/9

    N2 - A search for charginos nearly mass degenerate with the lightest neutralino is performed with the data collected by the ALEPH detector at LEP, at centre-of-mass energies between 189 and 209 GeV, corresponding to an integrated luminosity of 628 pb-1. The analysis is based on the detection of isolated and energetic initial state radiation photons, produced in association with chargino pairs whose decay products have little visible energy. The number of candidate events observed is in agreement with that expected from Standard Model background sources. These results are combined with those of other direct searches for charginos, and a lower limit of 88 GeV/c2 at 95% confidence level is derived for the chargino mass in the case of heavy sfermions, irrespective of the chargino-neutralino mass difference.

    AB - A search for charginos nearly mass degenerate with the lightest neutralino is performed with the data collected by the ALEPH detector at LEP, at centre-of-mass energies between 189 and 209 GeV, corresponding to an integrated luminosity of 628 pb-1. The analysis is based on the detection of isolated and energetic initial state radiation photons, produced in association with chargino pairs whose decay products have little visible energy. The number of candidate events observed is in agreement with that expected from Standard Model background sources. These results are combined with those of other direct searches for charginos, and a lower limit of 88 GeV/c2 at 95% confidence level is derived for the chargino mass in the case of heavy sfermions, irrespective of the chargino-neutralino mass difference.

    UR - http://www.scopus.com/inward/record.url?scp=0037046590&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0037046590&partnerID=8YFLogxK

    U2 - 10.1016/S0370-2693(02)01584-8

    DO - 10.1016/S0370-2693(02)01584-8

    M3 - Article

    VL - 533

    SP - 223

    EP - 236

    JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

    JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

    SN - 0370-2693

    IS - 3-4

    ER -