Measurement of CP-Violation Parameter sin(2phi1) with 152 Million BB-bar Pairs
The Belle Collaboration, K. Abe
Abstract
We present a precise measurement of the standard model CP-violation parameter sin(2phi1) based on a sample of 152 x 106 BB-bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is reconstructed in a J/psi Ks0, psi(2S) Ks0, chic1 Ks0, etac Ks0, J/psi K*0, or J/psi KL CP-eigenstate decay channel and the flavor of the accompanying B meson is identified from its decay products. From the asymmetry in the distribution of the time interval between the two B meson decay points, we obtain sin(2phi1) = 0.733 +/- 0.057(stat) +/- 0.028(syst).
Create a lesson
Related papers
Operational Challenges in Efficient and Sustainable Operation of the Event Processing Nodes GPU Farm at the ALICE Experiment
Federico Ronchetti, Giada Erba
Measurements of isolated photon pair production in association with jets in pp collisions at s = 8 TeV with the ATLAS detector
ATLAS Collaboration
Projected sensitivity of the detector to photophobic and fermion-coupled axion-like particles
Riley Aumonier, Oleg Brandt, Theo Reymermier et al.
Search for heavy neutral leptons in top quark decays with same-sign, same-flavor dilepton final states in proton-proton collisions at s = 13 TeV
CMS Collaboration
A New Precise Measurement of the e+e-π+π-(γ) Cross Section with the Initial-State Radiation Method at BaBar
BaBar Collaboration
A New Precise Measurement of the e+e-π+π-(γ) Cross Section with the Initial-State Radiation Method at BaBar
BaBar Collaboration