Report of the Quark Flavor Physics Working Group

Abstract

This report represents the response of the Intensity Frontier Quark Flavor Physics Working Group to the Snowmass charge. We summarize the current status of quark flavor physics and identify many exciting future opportunities for studying the properties of strange, charm, and bottom quarks. The ability of these studies to reveal the effects of new physics at high mass scales make them an essential ingredient in a well-balanced experimental particle physics program.

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• Evidence for an excess of B -> D(*) Tau Nu decays
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• The LHCb Trigger and its Performance in 2011
• Model-independent constraints on Delta F=2 operators and the scale of New Physics
• Determination of the X(3872) meson quantum numbers
• Review of lattice results concerning low energy particle physics
• First evidence for the decay Bs -> mu+ mu-
• Measurement of the B(s) to mu+ mu- branching fraction and search for B0 to mu+ mu- with the CMS Experiment
• Multiple-channel generalization of Lellouch-Luscher formula
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ branching fraction and search for $B^0\to {\mu }^{+}{\mu }^{-}$ decays at the LHCb experiment
• Probing New Physics via the $B_s^0\to {\mu }^{+}{\mu }^{-}$ Effective Lifetime
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• Physics at Super B Factory
• The Scalar Strange Content of the Nucleon from Lattice QCD
• New measurement of the K+ => pi+,nu,nubar branching ratio
• Lattice QCD inputs to the CKM unitarity triangle analysis
• Implications of D^0-\bar D^0 Mixing for New Physics
• Differential branching fraction and angular analysis of the decay $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$
• Evidence for B- -> tau- nu_tau-bar with a Hadronic Tagging Method Using the Full Data Sample of Belle
• On the Standard Model prediction for BR(B{s,d} to mu+ mu-)
• Observation of double charm production involving open charm in pp collisions at $\sqrt{s}$=7 TeV
• Predictions of selected flavour observables within the Standard Model
• Fundamental Physics at the Intensity Frontier
• Epsilon_K at Next-to-Next-to-Leading Order: The Charm-Top-Quark Contribution
• Measurement of CP violation and the B_s^0 meson decay width difference with B_s^0\to J/ψK^+ K^- and B_s^0\to J/ψπ^+π^- decays
• Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb^-1 of p pbar collisions
• Inclusive $W$ and $Z$ production in the forward region at $\sqrt{s}=7$ TeV
• Evidence of B-->tau nu decays with hadronic B tags
• Precision Measurement of B(D+ -> mu+ nu) and the Pseudoscalar Decay Constant fD+
• FCNC portals to the dark sector
• Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays
• S-waves and the Measurement of CP Violating Phases in Bs Decays
• D-Dbar mixing and new physics: general considerations and constraints on the MSSM
• New Physics in B-Bbar mixing in the light of recent LHCb data
• High-Precision $f_{B_s}$ and HQET from Relativistic Lattice QCD
• Analysis of the resonant components in Bs->J/ψπ+π-
• Observation of D0-D0bar oscillations
• A precise sum rule among four B -> Kpi CP asymmetries
• Lattice determination of the $K\to (\pi \pi {)}_{I=2}$ Decay Amplitude $A_2$
• Search for the X(4140) state in B+ to J/psi phi K+ decays
• Search for the decay Bs0 -> mu mu with the ATLAS detector
• Search for B_s to mu^+ mu^- and B^0 to mu^+ mu^- decays
• Measurement of CP Asymmetries and Branching Fractions in Charmless Two-Body B-Meson Decays to Pions and Kaons
• Evidence for B- -> tau- nu_bar with a Semileptonic Tagging Method
• Emerging understanding of the ΔI = 1/2 Rule from Lattice QCD
• Searches for Majorana neutrinos in B- decays
• Long distance contribution to the $K_L-K_S$ mass difference
• Lessons from Recent Measurements of D-\bar D Mixing
• $K$ to $\pi \pi$ Decay amplitudes from Lattice QCD
• Observation of Direct CP-Violation in B0 --> pi+pi- Decays and Model-Independent Constraints on phi2
• Lambda_b -> Lambda l+ l- form factors and differential branching fraction from lattice QCD
• Measurement of the flavour-specific CP-violating asymmetry $a_{\mathrm{sl}}^s$ in $B_s^0$ decays
• Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb
• Quarkonium at the Frontiers of High Energy Physics: A Snowmass White Paper
• First measurement of the CP-violating phase in $B_s^0\to \varphi \varphi$ decays
• Project X: Physics Opportunities
• Measurement of CP asymmetries in $B^0\to K^0{\pi }^0$ decays
• Future prospects of B physics
• The case for measuring gamma precisely
• Overview of constraints on new physics in rare B decays
• Could Charm's "Third Time" Be the Real Charm? -- A Manifesto
• The charm physics programme at the LHCb upgrade, and Atlas and CMS upgrades
• Lattice Calculations of B to K/K*l+l- form factors
• Improved measurements of $D_s$ meson decay constant and branching fractions of $D_s^{+}\to K^{-}{K}^{+}{\pi }^{+}$, $\bar{K}{}^0{K}^{+}$ and $\eta {\pi }^{+}$ decays from Belle
• Status and prospects of SuperKEKB collider and Belle II experiment

Cited by in corpus (9)

• Towards the Identification of New Physics through Quark Flavour Violating Processes
• High scale flavor alignment in two-Higgs doublet models and its phenomenology
• Inclusive weak decays of heavy hadrons with power suppressed terms at NLO
• QCD corrections to inclusive heavy hadron weak decays at ${\Lambda }_{\mathrm{QCD}}^3/m_Q^3$
• Constraints on $Z^{\prime }$ Boson within Minimal Flavor Violation
• Search for new physics via photon polarization of $b\to s\gamma$
• Invisible $K_L$ decays in the SM extensions
• Planning the Future of U.S. Particle Physics (Snowmass 2013): Chapter 2: Intensity Frontier
• Testing the Standard Model under the weight of heavy flavors