Baryon Number Violating Scalar Diquarks at the LHC

Abstract

Baryon number violating (BNV) processes are heavily constrained by experiments searching for nucleon decay and neutron-antineutron oscillations. If the baryon number violation occurs via the third generation quarks, however, we may be able to avoid the nucleon stability constraints, thus making such BNV interactions accessible at the LHC. In this paper we study a specific class of BNV extensions of the standard model (SM) involving diquark and leptoquark scalars. After an introduction to these models we study one promising extension in detail, being interested in particles with mass of O(TeV). We calculate limits on the masses and couplings from neutron-antineutron oscillations and dineutron decay for couplings to first and third generation quarks. We explore the possible consequences of such a model on the matter-antimatter asymmetry. We shall see that for models which break the global baryon minus lepton number symmetry, (B-L), the most stringent constraints come from the need to preserve a matter-antimatter asymmetry. That is, the BNV interaction cannot be introduced if it would remove the matter-antimatter asymmetry independent of baryogenesis mechanism and temperature. Finally, we examine the phenomenology of such models at colliders such as the LHC.

10 pages, 9 figures. v2: references added, some typos corrected. v3: some small corrections to match published version, no change in conclusions

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• New parton distributions for collider physics
• Post--Sphaleron Baryogenesis
• Flavourful Production at Hadron Colliders
• Color Sextet Scalars at the CERN Large Hadron Collider
• Neutrino Mass Hierarchy and neutron-anti-neutron Oscillation from Baryogenesis
• Limits on scalar leptoquark interactions and consequences for GUTs
• Diquark Higgs at LHC
• Baryogenesis and neutron-antineutron oscillation at TeV
• Search for pair production of first or second generation leptoquarks in proton-proton collisions at sqrt(s)=7 TeV using the ATLAS detector at the LHC
• Search for Pair Production of First-Generation Scalar Leptoquarks in pp Collisions at sqrt(s) = 7 TeV
• Search for Pair Production of Second-Generation Scalar Leptoquarks in pp Collisions at sqrt(s) = 7 TeV

Cited by in corpus (20)

• Baryon Number and Lepton Universality Violation in Leptoquark and Diquark Models
• Simplified models with baryon number violation but no proton decay
• Post-Sphaleron Baryogenesis and an Upper Limit on the Neutron-Antineutron Oscillation Time
• Heavy and light scalar leptoquarks in proton decay
• Inclusive Nucleon Decay Searches as a Frontier of Baryon Number Violation
• CP Violating Baryon Oscillations
• Coupling Unification, GUT-Scale Baryogenesis and Neutron-Antineutron Oscillation in SO(10)
• Testable two-loop radiative neutrino mass model based on an $LLQ{d}^{c}Q{d}^c$ effective operator
• Universal Scalar Leptoquark Action for Matching
• An EFT approach to baryon number violation: lower limits on the new physics scale and correlations between nucleon decay modes
• Three-generation baryon and lepton number violation at the LHC
• LHC Constraints on Scalar Diquarks
• Determining Majorana Nature of Neutrino from Nucleon Decays and n-nbar oscillations
• Electric Dipole Moments from Post-Sphaleron Baryogenesis
• $B-L$ violating nucleon decays as a probe of leptoquarks and implications for baryogenesis
• Proton annihilation at hadron colliders and Kamioka: high-energy versus high-luminosity
• High-scale baryogenesis with testable neutron-antineutron oscillation and dark matter
• Exotic coloured fermions and lepton number violation at the LHC
• Baryogenesis via relativistic bubble expansion
• LHC probes of the 10 TeV scale