The resonant substructures of B0 → anti-D0 π+ π− decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb^−1 of pp collisions collected by the LHCb detector is used. The branching fraction of the B0 → anti-D0 π+ π− decay in the region m(anti-D0 π±) > 2.1 GeV/c2 is measured to be (8.46 ± 0.14 ± 0.29 ± 0.40) × 10^−4, where the first uncertainty is statistical, the second is systematic and the last arises from the normalization channel B0 → D∗(2010)− π+. The π+ π− S-wave components are modeled with the isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at m(anti-D0 π−) ≈ 2.8 GeV/c2 is confirmed and its spin-parity is determined for the first time as J^P=3^−. The branching fraction, mass and width of this structure are determined together with those of the D∗0(2400)− and D∗2(2460)− resonances. The branching fractions of other B0 → anti-D0 h0 decay components with h0 → π+ π− are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays B0 → anti-D0 f0(500), B0 → anti-D0 f0(980), B0 → anti-D0 ρ(1450), B0 → D∗3(2760)− π+ and the first evidence of B0 → anti-D0 f0(2020) are presented.

Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Dalitz Plot Analysis of B0 → anti-D0 π+ π− Decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 92(3), 1-40 [10.1103/PhysRevD.92.032002].

Dalitz Plot Analysis of B0 → anti-D0 π+ π− Decays

Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2015

Abstract

The resonant substructures of B0 → anti-D0 π+ π− decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb^−1 of pp collisions collected by the LHCb detector is used. The branching fraction of the B0 → anti-D0 π+ π− decay in the region m(anti-D0 π±) > 2.1 GeV/c2 is measured to be (8.46 ± 0.14 ± 0.29 ± 0.40) × 10^−4, where the first uncertainty is statistical, the second is systematic and the last arises from the normalization channel B0 → D∗(2010)− π+. The π+ π− S-wave components are modeled with the isobar and K-matrix formalisms. Results of the Dalitz plot analyses using both models are presented. A resonant structure at m(anti-D0 π−) ≈ 2.8 GeV/c2 is confirmed and its spin-parity is determined for the first time as J^P=3^−. The branching fraction, mass and width of this structure are determined together with those of the D∗0(2400)− and D∗2(2460)− resonances. The branching fractions of other B0 → anti-D0 h0 decay components with h0 → π+ π− are also reported. Many of these branching fraction measurements are the most precise to date. The first observation of the decays B0 → anti-D0 f0(500), B0 → anti-D0 f0(980), B0 → anti-D0 ρ(1450), B0 → D∗3(2760)− π+ and the first evidence of B0 → anti-D0 f0(2020) are presented.
2015
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., et al. (2015). Dalitz Plot Analysis of B0 → anti-D0 π+ π− Decays. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 92(3), 1-40 [10.1103/PhysRevD.92.032002].
Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/515465
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