TY - JOUR
T1 - New inflation in supergravity after Planck and LHC
AU - Takahashi, Fuminobu
N1 - Funding Information:
The author thanks Michael Dine for communications at Tohoku Workshop on “Higgs and Beyond” where the present work was initiated. The author is grateful to T. Yanagida for useful comments. This work was supported by Grant-in-Aid for Scientific Research on Innovative Areas (No. 24111702 , No. 21111006 , and No. 23104008 ), Scientific Research (A) (No. 22244030 and No. 21244033 ), and JSPS Grant-in-Aid for Young Scientists (B) (No. 24740135 ), and Inoue Foundation for Science . This work was also supported by World Premier International Center Initiative (WPI Program), MEXT, Japan [FT].
PY - 2013/11/25
Y1 - 2013/11/25
N2 - We revisit a single-field new inflation model based on a discrete R symmetry. Interestingly, the inflaton dynamics naturally leads to a heavy gravitino of mass m3/2=O(1-100)TeV, which is consistent with the standard-model like Higgs boson of mass mh≃126GeV. However, the predicted spectral index ns≈0.94 is in tension with the Planck result, ns=0.9603±0.073. We show that the spectral index can be increased by allowing a small constant term in the superpotential during inflation. The required size of the constant is close to the largest allowed value for successful inflation, and it may be a result of a pressure toward larger values in the landscape. Alternatively, such constant term may arise in association with supersymmetry breaking required to cancel the negative cosmological constant from the inflaton sector.
AB - We revisit a single-field new inflation model based on a discrete R symmetry. Interestingly, the inflaton dynamics naturally leads to a heavy gravitino of mass m3/2=O(1-100)TeV, which is consistent with the standard-model like Higgs boson of mass mh≃126GeV. However, the predicted spectral index ns≈0.94 is in tension with the Planck result, ns=0.9603±0.073. We show that the spectral index can be increased by allowing a small constant term in the superpotential during inflation. The required size of the constant is close to the largest allowed value for successful inflation, and it may be a result of a pressure toward larger values in the landscape. Alternatively, such constant term may arise in association with supersymmetry breaking required to cancel the negative cosmological constant from the inflaton sector.
UR - http://www.scopus.com/inward/record.url?scp=84887403555&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84887403555&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2013.10.026
DO - 10.1016/j.physletb.2013.10.026
M3 - Article
AN - SCOPUS:84887403555
VL - 727
SP - 21
EP - 26
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 - 1-3
ER -