Measurement of B- -> tau- nu_tau-bar Decay With a Semileptonic Tagging Method

Details Measurement of B- -> tau- nu_tau-bar Decay With a Semileptonic Tagging Method Measurement of B- -> tau- nu_tau-bar Decay With a Semileptonic Tagging Method

2008-09-23

arxiv.org/abs/0809.3834v1

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 2 figures, Contributed to the 34th International Conference On High Energy Physics (ICHEP 2008)

Scientific paper

We present a new measurement of the decay B- -> tau- nu_tau-bar with a semileptonic B tagging method, using a data sample containing 657*10^6 BB-bar pairs collected at the (4S) resonance with the Belle detector at the KEKB asymmetric e+e- collider. A sample of BB pairs are tagged by reconstructing one B meson decaying semileptonically. We detect the B- -> tau- nu_tau-bar candidate in the recoil. We obtain a signal with a signicance of 3.8 standard deviations including systematics, and measure the branching fraction to be B(B- -> tau- nu_tau-bar)=(1.65+0.38-0.37(stat)+0.35-0.37(syst))*10^4. This result confirms the evidence for B- -> tau- nu_tau-bartained in the previous Belle measurement with a hadronic B tagging method.

Affiliated with

Also associated with

No associations

Rating

Measurement of B- -> tau- nu_tau-bar Decay With a Semileptonic Tagging Method does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of B- -> tau- nu_tau-bar Decay With a Semileptonic Tagging Method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of B- -> tau- nu_tau-bar Decay With a Semileptonic Tagging Method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-326583