CP Violation with B Mesons

I propose an experiment to measure CP violation in B0 meson decays by collecting B mesons via [Formula: see text] and looking for a difference between final states with a positive lepton and a CP eigenstate and those with a negative lepton and a CP eigenstate. It is predicted that ~107 events would be sufficient.

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CP ASYMMETRIES IN NONLEPTONIC DECAY OF NEUTRAL B MESONS FOR THREE AND FOUR GENERATIONS

Modern Physics Letters A ◽

10.1142/s0217732389002756 ◽

1989 ◽

Vol 04 (25) ◽

pp. 2465-2471 ◽

Cited By ~ 4

Author(s):

TSUTOM HASUIKE ◽

TOSHIHIKO HATTORI ◽

TOSHIO HAYASHI ◽

SEIICHI WAKAIZUMI

Keyword(s):

Cp Violation ◽

B Mesons ◽

Branching Ratio ◽

Fourth Generation ◽

Nonleptonic Decay ◽

Present Stage ◽

Decay Modes ◽

Quark Pairs ◽

Mixing Parameter ◽

O 10

We investigate the effects of CP violation in nonleptonic decays of neutral B mesons (Bd, Bs) in the Kobayashi-Maskawa model through the quark exchange diagram in terms of the Wolfenstein matrix. In our calculation, we use the new data of mixing parameter xd= 0.70±0.13 which is derived from ARGUS and CLEO measurements and the new data on the branching ratio for Bd meson. We obtain the results that CP violating asymmetries for Bd→D+D−, π+π− and K+K− reach about 50% and the number of [Formula: see text] quark pairs needed to detect the asymmetry is O(106~107) at 3σ level, and the asymmetries for [Formula: see text], D−π+, D0π0 and D+π− reach the order of 20% and the number of [Formula: see text] pairs is O(108). Therefore, we may conclude that the CP violation for these decay modes is possibly observable at the present stage. The effects of fourth generation quarks on CP violation are also studied.

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RARE B AND τ DECAYS AND SEARCHES FOR NEW PHYSICS

International Journal of Modern Physics A ◽

10.1142/s0217751x07038694 ◽

2007 ◽

Vol 22 (30) ◽

pp. 5433-5442

Author(s):

R. J. BARLOW

Keyword(s):

Cp Violation ◽

Standard Model ◽

Excellent Agreement ◽

Rare Decays ◽

B Mesons ◽

New Physics ◽

B Decays ◽

The Standard Model ◽

Model Predictions ◽

Vector Particles

New results on rare decays of B mesons and τ leptons are summarised. Measurement are generally in excellent agreement with the Standard Model predictions, the only exceptions being the polarisation of vector particles in B decays and the non-appearance of CP violation in B ± → K ±π0.

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