Flavor Physics Constraints on TeV Scale Color Sextet Scalars

2013/11/16 by Elaine C. F. S. Fortes, Fortes, Elaine C. F. S., K. S. Babu +3 · 5 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1311.4101

Abstract

In this work we present an analysis of flavor violating effects mediated by color sextet scalars, which arise naturally in left-right symmetric gauge theories based on SU(2)_L × SU(2)_R × SU(4)_C group. The sextets, denoted here by Δ_dd, Delta_ud and Δ_uu, couple to right--handed quarks. We delineate the constraints on these couplings arising from meson--anti-meson transitions and flavor changing weak decays. The sextet Δ_uu mediates D⁰-D⁰ mixing via tree-level and box diagrams, and also mediates D --> K pi, pi pi decays. The sextets Δ_ud and Δ_dd mediate B_d⁰-B_d⁰, B_s⁰-B_s⁰ and K⁰-K⁰ mixings as well as rare B and D meson decays. Our analysis shows that for coupling strengths of order 10^-2, the current experimental data requires the mass of these color sextets to exceed several TeV. These bounds are stronger than those obtained from direct LHC searches.

Cited by

• The Lepton-Gluon Portal Beyond Lepto-Gluons
• Portals to New Physics: The W-Quark Portal
• Beyond Neutrino Mass: Observable n-n Oscillations in UV Complete Seesaw Models
• LHC probes of the 10 TeV scale
• Ultraheavy resonances at the LHC: beyond the QCD background

Related

• Implications of B → K νν under Rank-One Flavor Violation hypothesis
• Flavor changing interactions confronted with meson mixing and hadron colliders
• Kzero--Anti-Kzero and Bzero--Anti-Bzero Constraints On Technicolor
• Study of T' Flavor Symmetry
• Flavor Physics in the LHC era: the role of the lattice