The first untagged decay-time-integrated amplitude analysis of Bs0 → KS0K±π∓ decays is performed using a sample corresponding to 3.0 fb−1 of pp collision data recorded with the LHCb detector during 2011 and 2012. The data are described with an amplitude model that contains contributions from the intermediate resonances K*(892)0,+, K2*(1430)0,+ and K0*(1430)0,+, and their charge conjugates. Measurements of the branching fractions of the decay modes Bs0 → K*(892)±K∓ and Bs0→K*(—)(892)0K0(—) are in agreement with, and more precise than, previous results. The decays Bs0 → K0*(1430)±K∓ and Bs0→K0*(—)(1430)0K0(—) are observed for the first time, each with significance over 10 standard deviations.

Amplitude analysis of Bs0 → KS0 K ± π ∓ decays

Calabrese, R.;Capriotti, L.;Fiorini, M.;Luppi, E.;Minzoni, L.;Pappalardo, L. L.;Skiba, I.;Tomassetti, L.;
2019

Abstract

The first untagged decay-time-integrated amplitude analysis of Bs0 → KS0K±π∓ decays is performed using a sample corresponding to 3.0 fb−1 of pp collision data recorded with the LHCb detector during 2011 and 2012. The data are described with an amplitude model that contains contributions from the intermediate resonances K*(892)0,+, K2*(1430)0,+ and K0*(1430)0,+, and their charge conjugates. Measurements of the branching fractions of the decay modes Bs0 → K*(892)±K∓ and Bs0→K*(—)(892)0K0(—) are in agreement with, and more precise than, previous results. The decays Bs0 → K0*(1430)±K∓ and Bs0→K0*(—)(1430)0K0(—) are observed for the first time, each with significance over 10 standard deviations.
2019
Aaij, R.; Beteta, C. Abellan; Adeva, B.; Adinolfi, M.; Aidala, C. A.; Ajaltouni, Z.; Akar, S.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2408910
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