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Weak phase gamma using isospin analysis and time-dependent asymmetry in B(d)-->K(S)pi(+)pi(-)
N G Deshpande1, Nita Sinha, Rahul Sinha
1Institute of Theoretical Science, University of Oregon, Eugene, Oregon 94703, USA. desh@oregon.uoregon.edu
Physical Review Letters
|March 14, 2003
Abstract:
We present a method for measuring the weak phase gamma using isospin analysis of three body B decays into Kpipi channels. Differential decay widths and time-dependent asymmetry in B(d)-->K(S)pi(+)pi(-) mode needs to be measured into even isospin pipi states. The method can be used to extract gamma, as well as the size of the electroweak penguin contributions. The technique is free from assumptions like SU(3) or neglect of any contributions to the decay amplitudes. By studying different regions of the Dalitz plot, it may be possible to reduce the ambiguity in the value of gamma.