Amplitude Analysis of the Decay (B)over-bar(0 )-> K-S(0)pi(+)pi(- )and First Observation of the CP Asymmetry in (B)over-bar(0 )-> K* (892)(-)pi(+)

作者：Aaij R.; Adeva B.; Adinolfi M.; Ajaltouni Z.; Akar S.; Albrecht J.; Alessio F.; Alexander M.; Alfonso Albero A.; Ali S.; Alkhazov G.; Cartelle P. Alvarez; Alves A. A. Jr.; Amato S.; Amerio S.; Amhis Y.; An L.; Anderlini L.; Andreassi G.; Andreotti M.; Andrews J. E.; Appleby R. B.; Archilli F.; d'Argent P.; Romeu J. Arnau; Artamonov A.; Artuso M.; Aslanides E.; Auriemma G.; Baalouch M.; Babuschkin I.; Bachmann S.; Back J. J.; Badalov A.; Baesso C.; Baker S.; Balagura V.; Baldini W.; Baranov A.

来源：Physical Review Letters, 2018, 120(26): 261801.

DOI：10.1103/PhysRevLeAt.120.261801

The time-integrated untagged Dalitz plot of the three-body hadronic charmless decay (B) over bar (0 )-> K-S(0)pi(+)pi(- ) is studied using a pp collision data sample recorded with the LHCb detector, corresponding to an integrated luminosity of 3.0 fb(-1). The decay amplitude is described with an isobar model. Relative contributions of the isobar amplitudes to the (B) over bar (0 )-> K-S(0)pi(+)pi(- ) decay branching fraction and CP asymmetries of the flavor-specific amplitudes are measured. The CP asymmetry between the conjugate (B) over bar (0 )-> K* (892)(-)pi(+) and (B) over bar (0 )-> K* (892)(-)pi(+) decay rates is determined to be -0.308 +/- 0.062.

• 出版日期2018-6-25