TY - JOUR
T1 - FD-term hybrid inflation with electroweak-scale lepton number violation
AU - Garbrecht, Björn
AU - Pilaftsis, Apostolos
N1 - Funding Information:
We thank Arjun Berera, Rudnei Ramos and Antonio Riotto for useful discussions. We also thank Constantine Pallis for collaboration in the early stages of this project. A.P. dedicates this work to the memory of Darwin Chang, an invaluable friend and collaborator. This work is supported in part by the PPARC research grants: PPA/G/O/2002/00471 and PP/C504286/1.
PY - 2006/5/11
Y1 - 2006/5/11
N2 - We study F-term hybrid inflation in a novel supersymmetric extension of the SM with a subdominant Fayet-Iliopoulos D-term. We call this particular form of inflation, in short, FD-term hybrid inflation. The proposed model ties the μ-parameter of the MSSM to an SO ( 3 )-symmetric Majorana mass mN, through the vacuum expectation value of the inflaton field. The late decays of the ultraheavy particles associated with the extra U ( 1 ) gauge group, which are abundantly produced during the preheating epoch, could lower the reheat temperature even up to 1 TeV, thereby avoiding the gravitino overproduction problem. The baryon asymmetry in the Universe can be explained by thermal electroweak-scale resonant leptogenesis, in a way independent of any pre-existing lepton- or baryon-number abundance. Further cosmological and particle-physics implications of the FD-term hybrid model are briefly discussed.
AB - We study F-term hybrid inflation in a novel supersymmetric extension of the SM with a subdominant Fayet-Iliopoulos D-term. We call this particular form of inflation, in short, FD-term hybrid inflation. The proposed model ties the μ-parameter of the MSSM to an SO ( 3 )-symmetric Majorana mass mN, through the vacuum expectation value of the inflaton field. The late decays of the ultraheavy particles associated with the extra U ( 1 ) gauge group, which are abundantly produced during the preheating epoch, could lower the reheat temperature even up to 1 TeV, thereby avoiding the gravitino overproduction problem. The baryon asymmetry in the Universe can be explained by thermal electroweak-scale resonant leptogenesis, in a way independent of any pre-existing lepton- or baryon-number abundance. Further cosmological and particle-physics implications of the FD-term hybrid model are briefly discussed.
UR - http://www.scopus.com/inward/record.url?scp=33646104683&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2006.03.059
DO - 10.1016/j.physletb.2006.03.059
M3 - Article
AN - SCOPUS:33646104683
SN - 0370-2693
VL - 636
SP - 154
EP - 165
JO - Physics Letters B
JF - Physics Letters B
IS - 3-4
ER -