Implications of the scalar tilt for the tensor-to-scalar ratio

Paolo Creminelli, Sergei Dubovsky, Diana López Nacir, Marko Simonović, Gabriele Trevisan, Giovanni Villadoro, Matias Zaldarriaga

    Research output: Contribution to journalArticle

    Abstract

    We investigate the possible implications of the measured value of the scalar tilt ns for the tensor-to-scalar ratio r in slow-roll, single-field inflationary models. The measured value of the tilt satisfies ns-1∼1/N∗, where N∗∼60 is the number of e-folds for observationally relevant scales. If this is not a coincidence and the scaling holds for different values of N, it strongly suggests that either r is as big as 10-1 (a possibility in tension with the recent data), or smaller than 10-2 and exponentially dependent on ns. A large region of the (ns,r) plane is not compatible with this scaling.

    Original languageEnglish (US)
    Article number123528
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume92
    Issue number12
    DOIs
    StatePublished - Dec 23 2015

    Fingerprint

    tensors
    scalars
    scaling

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Creminelli, P., Dubovsky, S., López Nacir, D., Simonović, M., Trevisan, G., Villadoro, G., & Zaldarriaga, M. (2015). Implications of the scalar tilt for the tensor-to-scalar ratio. Physical Review D - Particles, Fields, Gravitation and Cosmology, 92(12), [123528]. https://doi.org/10.1103/PhysRevD.92.123528

    Implications of the scalar tilt for the tensor-to-scalar ratio. / Creminelli, Paolo; Dubovsky, Sergei; López Nacir, Diana; Simonović, Marko; Trevisan, Gabriele; Villadoro, Giovanni; Zaldarriaga, Matias.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 92, No. 12, 123528, 23.12.2015.

    Research output: Contribution to journalArticle

    Creminelli, P, Dubovsky, S, López Nacir, D, Simonović, M, Trevisan, G, Villadoro, G & Zaldarriaga, M 2015, 'Implications of the scalar tilt for the tensor-to-scalar ratio', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 92, no. 12, 123528. https://doi.org/10.1103/PhysRevD.92.123528
    Creminelli P, Dubovsky S, López Nacir D, Simonović M, Trevisan G, Villadoro G et al. Implications of the scalar tilt for the tensor-to-scalar ratio. Physical Review D - Particles, Fields, Gravitation and Cosmology. 2015 Dec 23;92(12). 123528. https://doi.org/10.1103/PhysRevD.92.123528
    Creminelli, Paolo ; Dubovsky, Sergei ; López Nacir, Diana ; Simonović, Marko ; Trevisan, Gabriele ; Villadoro, Giovanni ; Zaldarriaga, Matias. / Implications of the scalar tilt for the tensor-to-scalar ratio. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2015 ; Vol. 92, No. 12.
    @article{0b027d19bf994ceaaed1cae8882fe48b,
    title = "Implications of the scalar tilt for the tensor-to-scalar ratio",
    abstract = "We investigate the possible implications of the measured value of the scalar tilt ns for the tensor-to-scalar ratio r in slow-roll, single-field inflationary models. The measured value of the tilt satisfies ns-1∼1/N∗, where N∗∼60 is the number of e-folds for observationally relevant scales. If this is not a coincidence and the scaling holds for different values of N, it strongly suggests that either r is as big as 10-1 (a possibility in tension with the recent data), or smaller than 10-2 and exponentially dependent on ns. A large region of the (ns,r) plane is not compatible with this scaling.",
    author = "Paolo Creminelli and Sergei Dubovsky and {L{\'o}pez Nacir}, Diana and Marko Simonović and Gabriele Trevisan and Giovanni Villadoro and Matias Zaldarriaga",
    year = "2015",
    month = "12",
    day = "23",
    doi = "10.1103/PhysRevD.92.123528",
    language = "English (US)",
    volume = "92",
    journal = "Physical review D: Particles and fields",
    issn = "1550-7998",
    publisher = "American Institute of Physics",
    number = "12",

    }

    TY - JOUR

    T1 - Implications of the scalar tilt for the tensor-to-scalar ratio

    AU - Creminelli, Paolo

    AU - Dubovsky, Sergei

    AU - López Nacir, Diana

    AU - Simonović, Marko

    AU - Trevisan, Gabriele

    AU - Villadoro, Giovanni

    AU - Zaldarriaga, Matias

    PY - 2015/12/23

    Y1 - 2015/12/23

    N2 - We investigate the possible implications of the measured value of the scalar tilt ns for the tensor-to-scalar ratio r in slow-roll, single-field inflationary models. The measured value of the tilt satisfies ns-1∼1/N∗, where N∗∼60 is the number of e-folds for observationally relevant scales. If this is not a coincidence and the scaling holds for different values of N, it strongly suggests that either r is as big as 10-1 (a possibility in tension with the recent data), or smaller than 10-2 and exponentially dependent on ns. A large region of the (ns,r) plane is not compatible with this scaling.

    AB - We investigate the possible implications of the measured value of the scalar tilt ns for the tensor-to-scalar ratio r in slow-roll, single-field inflationary models. The measured value of the tilt satisfies ns-1∼1/N∗, where N∗∼60 is the number of e-folds for observationally relevant scales. If this is not a coincidence and the scaling holds for different values of N, it strongly suggests that either r is as big as 10-1 (a possibility in tension with the recent data), or smaller than 10-2 and exponentially dependent on ns. A large region of the (ns,r) plane is not compatible with this scaling.

    UR - http://www.scopus.com/inward/record.url?scp=84953286216&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84953286216&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevD.92.123528

    DO - 10.1103/PhysRevD.92.123528

    M3 - Article

    VL - 92

    JO - Physical review D: Particles and fields

    JF - Physical review D: Particles and fields

    SN - 1550-7998

    IS - 12

    M1 - 123528

    ER -