Publication

Study of the B-0 (770)degrees K-*(892)(0) decay with an amplitude analysis of B-0 ((+-))(K+pi(-)) decays

Olivier Schneider, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Yasmine Sara Amhis, Elena Graverini, Michel De Cian, Federico Leo Redi, Vladimir Macko, Pietro Marino, Tara Nanut, Violaine Bellée, Pavol Stefko, Maria Vieites Diaz, Alessio Ferrari, Guillaume Max Pietrzyk, Luca Pescatore, Guido Andreassi, François Fleuret, Maxime Schubiger, Chitsanu Khurewathanakul, Christoph Frei, Greig Alan Cowan, Vladislav Balagura, Ian William Marison, Jessica Prisciandaro, Mark Tobin, Mirco Dorigo, Conor Thomas Fitzpatrick, Matthieu Philippe Luther Marinangeli, Tommaso Colombo, Marco Calvi, Sergi Aguacil Moreno, Liupan An, Marilisa Neri, Hang Yin, Jianqi Hu, Michael Thompson McCann, Simon Van Mulders, Vincenzo Battista, Giovanni Veneziano, Matteo Fontana, Benedikt Sebastian Braun, Brice Emile Maurin, Nathalie Sophie Adeline Serra, Léonard Yannick Maurice Eymann, Adriano Pastore, Valérie Jeanne Thérèse Renaudin-Schouler, Luc Henry, Xiao Yuan, Basil Andrew Stansfield Davis, Craig Matthew Smith, Juan Federico Esteban Müller, Achille Mauri, Aleksey Vorobyev, Jae Sun Jeong, Jiujiu Yu, Darius Constantin Merk, Xiao Di, Wanqiu Hu
2019
Journal Articles

Abstract

An amplitude analysis of B-0 ((+-))(K+-) decays is performed in the two-body invariant mass regions 300 < m((+-)) < 1100 MeV/c(2), accounting for the (0), , f(0)(500), f(0)(980) and f(0)(1370) resonances, and 750 < m(K+-) < 1200 MeV/c(2), which is dominated by the K-(892)(0) meson. The analysis uses 3 fb(-1) of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The CP averages and asymmetries are measured for the magnitudes and phase differences of the con- tributing amplitudes. The CP-averaged longitudinal polarisation fractions of the vector-vector modes are found to be fK0 = 0.164 +/- 0.015 +/- 0.022 and fK0 = 0.68 +/- 0.17 +/- 0.16, and their CP asymmetries, AK0 = -0.62 +/- 0.09 +/- 0.09 and AK*0 = -0.13 +/- 0.27 +/- 0.13, where the first uncertainty is statistical and the second systematic.

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Study of the B-0 (770)degrees K-*(892)(0) decay with an amplitude analysis of B-0 ((+-))(K+pi(-)) decays

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