Measurement of the B 0 B 0 oscillation frequency
نویسندگان
چکیده
The oscillation frequency ∆md of B 0B0 mixing is measured using the partially reconstructed semileptonic decay B0 → l−νD∗+X. The data sample was collected with the CDF detector at the Fermilab Tevatron collider during 1992–1995 by triggering on the existence of two lepton candidates in an event, and corresponds to about 110 pb−1 of p̄p collisions at √ s = 1.8 TeV. We estimate the proper decay time of the B0 meson from the measured decay length and reconstructed momentum of the l−D∗+ system. The charge of the lepton in the final state identifies the flavor of the B0 meson at its decay. The second lepton in the event is used to infer the flavor of the B0 meson at production. We measure the oscillation frequency to be ∆md = 0.516 ± 0.099 + 0.029 − 0.035 ps −1, where the first uncertainty is statistical and the second is systematic. PACS numbers: 14.40.Nd, 13.20.He
منابع مشابه
CP violation in B decays at the B A B AR experiment
During the first year of data taking, the 1999-2000 run, the BABAR detector at the SLAC PEP-II asymmetric collider has collected an integrated luminosity of 20.7 fb −1 corresponding to 22.7 million BB pairs at the Υ(4S) resonance. Using this data, we present the measurement of sin2β based on samples of B 0 → J/ψ K 0 S , B 0 → ψ(2S)K 0 S and B 0 → J/ψ K 0 L decays. Our measured value is sin2β = ...
متن کاملProspects for the measurement of B 0 s oscillations with the ATLAS detector at LHC
CKM03 Prospects for the measurement of B 0 s oscillations with the ATLAS detector at LHC The prospects for the measurement of B 0 s oscillations with the ATLAS detector at the Large Hadron Collider are presented. B 0 s candidates in the D − s π + and D − s a + 1 decay modes from semileptonic events were fully simulated and reconstructed, using a detailed detector description. The sensitivity an...
متن کاملMeasurement of the oscillation frequency for B 0 – B 0 mixing using hadronic B 0 decays Belle Collaboration
The oscillation frequency of B0– B 0 mixing ( md ) has been measured using 29.1 fb−1 of data collected with the Belle detector at KEKB. This measurement is made through the distributions of the proper decay time difference of B pairs in events tagged as sameand opposite-flavor decays. In each event, one B is fully reconstructed in a flavor-specific hadronic decay mode, while the flavor of the o...
متن کاملMeasurement of the Oscillation Frequency for B 0 - B 0 Mixing using Hadronic B 0 Decays
The oscillation frequency of B0-B0 mixing (∆md) has been measured using 29.1 fb −1 of data collected with the Belle detector at KEKB. This measurement is made through the distributions of the proper decay time difference of B pairs in events tagged as sameand opposite-flavor decays. In each event, one B is fully reconstructed in a flavor-specific hadronic decay mode, while the flavor of the oth...
متن کاملMeasurement of the Oscillation Frequency for B 0 - B 0 Mixing using Hadronic B 0 Decays Belle
The oscillation frequency of B0-B0 mixing (∆md) has been measured using 29.1 fb −1 of data collected with the Belle detector at KEKB. This measurement is made through the distributions of the proper decay time difference of B pairs in events tagged as sameand opposite-flavor decays. In each event, one B is fully reconstructed in a flavor-specific hadronic decay mode, while the flavor of the oth...
متن کاملPreliminary Measurements of the
Preliminary Measurements of the Time Dependence of B 0 d ? B 0 d Mixing with Kaon and Charge Dipole Tags The SLD Collaboration ? Abstract We report two preliminary measurements of the time dependence of B 0 d ? B 0 d mixing using novel techniques with a sample of 150,000 hadronic Z 0 decays collected by the SLD experiment at the SLC. B decay vertices are reconstructed inclusively with a topolog...
متن کامل