On new physics in $\Delta {\Gamma }_d$

Abstract

Motivated by the recent measurement of the dimuon asymmetry by the DØ collaboration, which could be interpreted as an enhanced decay rate difference in the neutral $B_d$-meson system, we investigate the possible size of new-physics contributions to $\Delta {\Gamma }_d$. In particular, we perform model-independent studies of non-standard effects associated to the dimension-six current-current operators $(\bar{d}p)({\bar{p}}^{\prime }b)$ with $p,p^{\prime }=u,c$ as well as $(\bar{d}b)(\bar{\tau }\tau )$. In both cases we find that for certain flavour or Lorentz structures of the operators sizable deviations of $\Delta {\Gamma }_d$ away from the Standard Model expectation cannot be excluded in a model-independent fashion.

35 pages, 14 figures. Equation (5.10) corrected, references added. Conclusions remain unchanged

References in corpus (62)

• QCD factorization for exclusive, non-leptonic B meson decays: General arguments and the case of heavy-light final states
• QCD factorization for B->PP and B->PV decays
• B_{s,d} -> l+ l- in the Standard Model with Reduced Theoretical Uncertainty
• Quark mass effects in B -> Xs gamma
• Theoretical update of Bs-Bs-bar mixing
• Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests
• Analysis of Neutral Higgs-Boson Contributions to the Decays B_s -> l^+l^- and B -> K l^+l^-
• Branching fractions, polarisation and asymmetries of B -> VV decays
• Exclusive radiative and electroweak b->d and b->s penguin decays at NLO
• B- and D-meson decay constants from three-flavor lattice QCD
• Evidence for an anomalous like-sign dimuon charge asymmetry
• Next-to-Leading Order QCD Corrections to the Lifetime Difference of $B_s$ Mesons
• Exclusive rare B -> K*e+e- decays at low recoil: controlling the long-distance effects
• Theory of B -> K(*)l+l- decays at high q^2: OPE and quark-hadron duality
• B-parameters of the complete set of matrix elements of (Delta B = 2) operators from the lattice
• B-meson decay constants from improved lattice NRQCD and physical u, d, s and c sea quarks
• CP asymmetry in flavour-specific B decays beyond leading logarithms
• Lifetime Differences and CP Violation Parameters of Neutral B Mesons at the Next-to-Leading Order in QCD
• The B and B_s Meson Decay Constants from Lattice QCD
• 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
• Less space for a new family of fermions
• Precise Calculation of the Dilepton Invariant-Mass Spectrum and the Decay Rate in $B^{\pm }\to {\pi }^{\pm }{\mu }^{+}{\mu }^{-}$ in the SM
• Search for the rare decay B_s^0->mu^+mu^-
• NNLO vertex corrections to non-leptonic B decays: Tree amplitudes
• Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set
• CP violation in B_s mixing from heavy Higgs exchange
• Precision Physics with B^0_s -> J/psi phi at the LHC: The Quest for New Physics
• B-physics from Nf=2 tmQCD: the Standard Model and beyond
• Enhanced $B_s$--${\bar{B}}_s$ lifetime difference and anomalous like-sign dimuon charge asymmetry from new physics in $B_s\to {\tau }^{+}{\tau }^{-}$
• Tests of Factorization and SU(3) Relations in B Decays into Heavy-Light Final States
• Measurement of the Lifetime Difference of $B_d$ Mesons: Possible and Worthwhile?
• Measurement of the semileptonic charge asymmetry in B0 meson mixing with the D0 detector
• Comment on new physics contributions to Gamma_{12}^s
• Study of CP-violating charge asymmetries of single muons and like-sign dimuons in p pbar collisions
• The Gold-plated mode revisited: sin(2 beta) and B^0 to J/Psi K_S in the Standard Model
• Lifetime Difference in B_s mixing: Standard Model and beyond
• Searching for New Physics in Rare $B\to \tau$ Decays
• The inclusive decay b to ccs revisited
• B -> X_d gamma and constraints on new physics
• First observation of the decay $B^{+}\to {\pi }^{+}{\mu }^{+}{\mu }^{-}$
• B meson B-parameters and the decay constant in two-flavor dynamical QCD
• |V_ub| from UTangles and B->pi l nu
• Measurement of the semileptonic charge asymmetry using Bs^0 -> D_s mu X decays
• Time-dependent angular analysis of the decay Bs -> J/psi phi and extraction of Delta Gamma_s and the CP-violating weak phase phi_s by ATLAS
• A simple relation for B_s-mixing
• A Search for the rare decay B0 --> tau+tau- at BABAR
• B- -> pi- pi0/rho- rho0 to NNLO in QCD factorization
• Theoretical update of $B$-Mixing and Lifetimes
• Possibility of large lifetime differences in neutral B meson systems
• Neutral Gauge Boson Contributions to the Dimuon Charge Asymmetry in B Decays
• The D0 same-charge dimuon asymmetry and possibile new CP violation sources in the $B_s-{\bar{B}}_s$ system
• CP Violating Contribution to Delta Gamma in the B_s System from Mixing with a Hidden Pseudoscalar
• Search for CP Violation in B0B0bar Mixing using Partial Reconstruction of B0-->D*-Xl+ nu and a Kaon Tag
• Anomalous CP-Violation in B_s-Bbar_s Mixing Due to a Light Spin-One Particle
• Understanding the like-sign dimuon charge asymmetry in $p\bar{p}$ collisions
• Measurement of CP-violating asymmetries in B^0 -> (rho pi)^0 decays using a time-dependent Dalitz plot analysis
• Randall-Sundrum Corrections to the Width Difference and CP-Violating Phase in $B_s^0$-Meson Decays
• Measurement of the Time-Dependent CP Asymmetry in B0 --> D(*)0_CP h0 Decays
• Study of B -> X gamma Decays and Determination of |V_td/V_ts|
• D0 dimuon charge asymmetry from B_s system with Z' couplings and the recent LHCb result
• Mixing asymmetries in B meson systems, the D0 like-sign dimuon asymmetry and generic New Physics

Cited by in corpus (30)

• $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ and $K_L\to {\pi }^0\nu \bar{\nu }$ in the Standard Model: Status and Perspectives
• $B_{(s)}^0$-mixing matrix elements from lattice QCD for the Standard Model and beyond
• Searching for New Physics with $b\to s{\tau }^{+}{\tau }^{-}$ processes
• On the ultimate precision of meson mixing observables
• Unified Framework for $B$-Anomalies, Muon $g-2$, and Neutrino Masses
• Model-independent bounds on new physics effects in non-leptonic tree-level decays of B-mesons
• New physics effects in tree-level decays
• Charming new physics in rare B-decays and mixing?
• A Common Origin of Neutrino Masses and $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$ Anomalies
• Anomalies in Particle Physics
• A puzzle in ${\bar{B}}_{(s)}^0\to D_{(s)}^{(\ast )+}\{{\pi }^{-},K^{-}\}$ decays and extraction of the $f_s/f_d$ fragmentation fraction
• Exploiting dijet resonance searches for flavor physics
• Implications for new physics from a novel puzzle in ${\bar{B}}_{(s)}^0\to D_{(s)}^{(\ast )+}\{{\pi }^{-},K^{-}\}$ decays
• CP violation in the B system
• Disintegration of beauty: a precision study
• Contributions to the width difference in the neutral $D$ system from hadronic decays
• $B$-anomalies in a twin Pati-Salam theory of flavour including the 2022 LHCb $R_{K^{(\ast )}}$ analysis
• Review of Semileptonic $B$ Anomalies
• Penguin contribution to width difference and CP asymmetry in $B_q$-${\bar{B}}_q$ mixing at order ${\alpha }_s^2{N}_f$
• Charming New $B$-Physics
• Revisiting rescattering contributions to ${\overline{B}}_{(s)}\to D_{(s)}^{(\ast )}M$ decays
• Measurement of the relative width difference of the $B^0$-${\bar{B}}^0$ system with the ATLAS detector
• Measurement of the $B_s^0$ lifetime in the flavor-specific decay channel $B_s^0\to D_s^{-}{\mu }^{+}\nu X$
• Diquark Explanation of $b\to s{\ell }^{+}{\ell }^{-}$
• Mixing asymmetries in B meson systems, the D0 like-sign dimuon asymmetry and generic New Physics
• Probing new physics in class-I $B$-meson decays into heavy-light final states
• ${\tau }_{B_s}/{\tau }_{B_d}$ and $\Delta {\Gamma }_s$ confront new physics in $b\to s\tau \tau$
• $B_s^0$-${\bar{B}}_s^0$ Oscillations as a New Tool to Explore CP Violation in $D_s^{\pm }$ Decays
• HQET sum rules for matrix elements of dimension-six four-quark operators for meson lifetimes within and beyond the Standard Model
• Theory Motivation: What measurements are needed?