Proton Stability and Dark Matter in a Realistic String MSSM

Abstract

We demonstrate the existence of an extra nonanomalous U(1) gauge symmetry in a three-generation Pati-Salam model constructed with intersecting D6-branes in Type IIA string theory on a T^6/(Z_2 \times Z_2) orientifold. This extra U(1) forbids all dimension-4, 5, and 6 operators which mediate proton decay in the MSSM. Moreover, this results in the effective promotion of baryon and lepton number to local gauge symmetries, which can potentially result in leptophobic and leptophilic $Z^{\prime }$ bosons observable at the LHC. Furthermore, it is not necessary to invoke R-parity to forbid the dimension-4 operators which allow rapid proton decay. However, R-parity may arise naturally from a spontaneously broken U(1)_{B-L}. Assuming the presence of R-parity, we then study the direct detection cross-sections for neutralino dark matter, including the latest constraints from the XENON100 experiment. We find that these limits are now within required range necessary to begin testing the model.

Expanded discussion of Z' boson phenomenology. Accepted for publication to Physical Review D. arXiv admin note: text overlap with arXiv:1103.6035

References in corpus (14)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Observation of an anomalous positron abundance in the cosmic radiation
• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Invariant Mass Distribution of Jet Pairs Produced in Association with a W boson in ppbar Collisions at sqrt(s) = 1.96 TeV
• Bounds on an anomalous dijet resonance in W+jets production in ppbar collisions at sqrt{s} =1.96 TeV
• A Realistic World from Intersecting D6-Branes
• Realistic Yukawa Textures and SUSY Spectra from Intersecting Branes
• Stringy origin of Tevatron Wjj anomaly
• Type IIA Pati-Salam Flux Vacua
• Variations of the Hidden Sector in a Realistic Intersecting Brane Model
• Stringy WIMP Detection and Annihilation
• Realistic Four-Generation MSSM in Type II String Theory

Cited by in corpus (7)

• Implications of String Constraints for Exotic Matter and Z' s Beyond the Standard Model
• Probing Light Stop Pairs at the LHC
• The $\mu \nu$SSM with an extra U(1)
• The $750$ GeV Diphoton Excesses in a Realistic D-brane Model
• The Diboson Excesses in Leptophobic $U(1{)}_{\mathrm{LP}}$ Models from String Theories
• Universal Soft Terms in the MSSM on D-branes
• Light Higgsino Dark Matter in the MSSM on D-branes