Mixing and lifetimes of $b$-hadrons

Abstract

We review the status of mixing and lifetimes of $b$-hadrons. We will show that $\Delta \Gamma /\Delta M$, $a_{sl}$ and $\varphi$ are better suited to search for new physics effects than $\Delta M$ alone, because of our poor knowledge of the decay constants. The theoretical precision in the determination of ${\Gamma }_{12}/M_{12}$ - which contains all information on $\Delta \Gamma /\Delta M$, $a_{sl}$ and $\varphi$ - can be tested directly by investigating the lifetimes of $b$-hadrons, because both quantities rely on the same theoretical footing. In particular we will also present a numerical estimate for the lifetime of the ${\Xi }_b$-baryon.

12 pages, invited talk at the XI Mexican Workshop on Particles and Fields, Tuxtla, Mexico, 7th - 12 th Nov. 2007

References in corpus (6)

• First Flavor-Tagged Determination of Bounds on Mixing-Induced CP Violation in Bs -> J/psi phi Decays
• Averages of b-hadron Properties at the End of 2005
• Unparticle physics effects in B_s mixing
• Measurement of Lifetime and Decay-Width Difference in B0s -> J/psi phi Decays
• Flavor Changing Neutral Higgs Bosons in a Supersymmetric Extension based on a $Q_6$ Family Symmetry
• Measurement of the Lambda_b lifetime using semileptonic decays

Cited by in corpus (17)

• Anatomy of New Physics in B-Bbar mixing
• Less space for a new family of fermions
• How much space is left for a new family?
• How large can the SM contribution to CP violation in $D^0-{\bar{D}}^0$ mixing be?
• Precision measurement of the mass and lifetime of the ${\Xi }_b^0$ baryon
• A simple relation for B_s-mixing
• Theoretical update of $B$-Mixing and Lifetimes
• Measurement of b hadron lifetimes in exclusive decays containing a J/psi in p-pbar collisions at sqrt(s)=1.96TeV
• Measurement of the Lambda(b)0 lifetime in pp collisions at sqrt(s) = 7 TeV
• Z-mediated charge and CP asymmetries and FCNCs in $B_{d,s}$ processes
• Measurement of the Lambda_b^0 lifetime in the exclusive decay Lambda_b^0 -> J/psi Lambda^0 in ppbar collisions at sqrt(s)=1.96 TeV
• Dispersive analysis of neutral meson mixing
• Axigluon on like-sign charge asymmetry ${\mathcal{A}}_{s\ell }^b$, FCNCs and CP asymmetries in B decays
• Like-sign dimuon charge asymmetry in Randall-Sundurm model
• Studying of B_s^0-\bar{B}_s^0 mixing and B_{s}\to K^{(*)-}K^{(*)+} decays within supersymmetry
• Selected Topics in Heavy Flavour Physics
• Theoretical status of the CKM Matrix