Measurement of b-hadron masses

Abstract

Measurements of b-hadron masses are performed with the exclusive decay modes B+ -> J/psi K+, B0 -> J/psi K*0, B0 -> J/psi K0S, B0_s -> J/psi phi and Lambda_b -> J/psi Lambda using an integrated luminosity of 35 pb-1 collected in pp collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with J/psi -> mu+mu- decays and verified to be known to a relative precision of 2 x 10^-4 using other two-body decays. The results are more precise than previous measurements, particularly in the case of the B0_s and Lambda_b masses.

9 pages (+ title page + author list), 3 figures, 4 tables

References in corpus (9)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Decay Chain Fitting with a Kalman Filter
• Measurement of $b$ hadron masses in exclusive $J/\psi$ decays with the CDF detector
• Precise B, B_s and B_c meson spectroscopy from full lattice QCD
• Measurement of the B^0_s - \bar{B}^0_s oscillation frequency Delta m_s in B^0_s -> D_s^-(3) pi decays
• Bottom baryons from a dynamical lattice QCD simulation
• Prompt K_short production in pp collisions at sqrt(s)=0.9 TeV
• Measurement of the Mass Difference m(B0) - m(B+)

Cited by in corpus (48)

• LHCb Detector Performance
• Test of lepton universality using $B^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ decays
• Observation of the doubly charmed baryon ${\Xi }_{cc}^{++}$
• Observation of structure in the $J/\psi$-pair mass spectrum
• Progress Toward Understanding Baryon Resonances
• Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV
• First observation of the doubly charmed baryon decay ${\Xi }_{cc}^{++}\to {\Xi }_c^{+}{\pi }^{+}$
• Measurement of the $B_s^0\to {\mu }^{+}{\mu }^{-}$ decay properties and search for the $B^0\to {\mu }^{+}{\mu }^{-}$ and $B_s^0\to {\mu }^{+}{\mu }^{-}\gamma$ decays
• Observation of excited Lambda_b0 baryons
• Measurement of the Λ_b^0, Ξ_b^- and Ω_b^- baryon masses
• Measurements of $B_c^{+}$ production and mass with the $B_c^{+}\to J/\psi {\pi }^{+}$ decay
• Observation of $B_c^{+}\to J/\psi D_s^{+}$ and $B_c^{+}\to J/\psi D_s^{\ast +}$ decays
• Precision measurement of D meson mass differences
• Odd parity bottom-flavored baryon resonances
• Observation of an excited $B_c^{+}$ state
• Observation of new resonances in the ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$ system
• Weak decays of $B_s$ mesons to $D_s$ mesons in the relativistic quark model
• Measurement of the ratio of branching fractions BR(B0 -> K*0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K*0 gamma
• Looking for possible new physics in $B\to D^{(\ast )}\tau {\nu }_{\tau }$ in light of recent data
• Measurement of the $B_c^{+}$ meson lifetime using $B_c^{+}\to J/\psi {\mu }^{+}{\nu }_{\mu }X$ decays
• Study of beauty hadron decays into pairs of charm hadrons
• Observation of a new ${\Xi }_b^0$ state
• Observation of a new baryon state in the ${\Lambda }_b^0{\pi }^{+}{\pi }^{-}$ mass spectrum
• Testing the molecular nature of ${\mathbf{D}}_{\mathbf{s}0}^{\ast }(2317)$ and ${\mathbf{D}}_0^{\ast }(2400)$ in semileptonic ${\mathbf{B}}_{\mathbf{s}}$ and $\mathbf{B}$ decays
• Evidence for the decay $B^0\to J/\psi \omega$ and measurement of the relative branching fractions of $B_s^0$ meson decays to $J/\psi \eta$ and $J/\psi {\eta }^{{}^{\prime }}$
• Observation of the decays ${\Lambda }_b^0\to {\chi }_{c1}p{K}^{-}$ and ${\Lambda }_b^0\to {\chi }_{c2}p{K}^{-}$
• Measurement of the Lambda_b lifetime and mass in the ATLAS experiment
• Charmless weak $B_s$ decays in the relativistic quark model
• First observation of a baryonic $B_c^{+}$ decay
• Evidence for the decay $B_s^0\to \overline{K}{}^{\ast 0}{\mu }^{+}{\mu }^{-}$
• Study of $D_{sJ}$ decays to $D^+\KS$ and $D^0{K}^{+}$ final states in $pp$ collisions
• Observation of ${\Lambda }_b^0\to \psi (2S)p{K}^{-}$ and ${\Lambda }_b^0\to J/\psi {\pi }^{+}{\pi }^{-}p{K}^{-}$ decays and a measurement of the ${\Lambda }_b^0$ baryon mass
• Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
• Study of $B_s^0\to J/\psi {\pi }^{+}{\pi }^{-}{K}^{+}{K}^{-}$ decays
• Measurement of the $B_s^0\to J/\psi K^{\ast 0}$ branching fraction and angular amplitudes
• Measurements of the branching fractions of the decays $B_s^0\to D_s^{\mp }{K}^{\pm }$ and $B_s^0\to D_s^{-}{\pi }^{+}$
• ${\chi }_{c1}$ and ${\chi }_{c2}$ resonance parameters with the decays ${\chi }_{c1,c2}\to J/\psi {\mu }^{+}{\mu }^{-}$
• Measurement of the $B_s^0\to J/\psi K_S^0$ branching fraction
• Observation of $B_c^{+}\to J/\psi D^{(\ast )}{K}^{(\ast )}$ decays
• Measurement of the effective B_s^0 -> J/ψ K_S^0 lifetime
• Precision measurement of the $B_c^{+}$ meson mass
• Observation of the decay ${\overline{B}}_s^0\to \psi (2S)K^{+}{\pi }^{-}$
• Higher order light-cone distribution amplitudes of the Lambda baryon
• Observation of the $B_s^0\to J/\psi \varphi \varphi$ decay
• Calibration of the momentum scale of a particle physics detector using the Armenteros-Podolanski plot
• B-physics results from Tevatron
• Observation of the decay $\overline{B_s^0}\to {\chi }_{c2}{K}^{+}{K}^{-}$ in the $\phi$ mass region
• Observation of muonic Dalitz decays of ${\chi }_b$ mesons and precise spectroscopy of hidden-beauty states