Abstract
A recent D-brane model designed to accommodate a phenomenologically acceptable fourth generation of chiral fermions was noted to produce an unexpected additional unbroken nonanomalous U(1) gauge group at the string scale. We show that the corresponding charges acting on minimal supersymmetric standard model fields count baryon and lepton numbers. If broken spontaneously at lower scales, these U(1)B and U(1)L symmetries provide potential avenues for preserving baryogenesis while nonetheless explaining the suppression of proton decay (without the need for R parity), as well as the smallness of right-handed neutrino Majorana masses compared to the string scale.
| Original language | English (US) |
|---|---|
| Article number | 075016 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 84 |
| Issue number | 7 |
| DOIs | |
| State | Published - Oct 18 2011 |
Fingerprint
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Gauged baryon and lepton number in MSSM4 brane worlds. / Lebed, Richard; Mayes, Van E.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 84, No. 7, 075016, 18.10.2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gauged baryon and lepton number in MSSM4 brane worlds
AU - Lebed, Richard
AU - Mayes, Van E.
PY - 2011/10/18
Y1 - 2011/10/18
N2 - A recent D-brane model designed to accommodate a phenomenologically acceptable fourth generation of chiral fermions was noted to produce an unexpected additional unbroken nonanomalous U(1) gauge group at the string scale. We show that the corresponding charges acting on minimal supersymmetric standard model fields count baryon and lepton numbers. If broken spontaneously at lower scales, these U(1)B and U(1)L symmetries provide potential avenues for preserving baryogenesis while nonetheless explaining the suppression of proton decay (without the need for R parity), as well as the smallness of right-handed neutrino Majorana masses compared to the string scale.
AB - A recent D-brane model designed to accommodate a phenomenologically acceptable fourth generation of chiral fermions was noted to produce an unexpected additional unbroken nonanomalous U(1) gauge group at the string scale. We show that the corresponding charges acting on minimal supersymmetric standard model fields count baryon and lepton numbers. If broken spontaneously at lower scales, these U(1)B and U(1)L symmetries provide potential avenues for preserving baryogenesis while nonetheless explaining the suppression of proton decay (without the need for R parity), as well as the smallness of right-handed neutrino Majorana masses compared to the string scale.
UR - http://www.scopus.com/inward/record.url?scp=80555132011&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80555132011&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.84.075016
DO - 10.1103/PhysRevD.84.075016
M3 - Article
VL - 84
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 1550-7998
IS - 7
M1 - 075016
ER -