The resonant substructure of B0s → anti-D0 K− π+ decays is studied using a data sample corresponding to an integrated luminosity of 3.0 fb^−1 of pp collision data recorded by the LHCb detector. An excess at m(anti-D0 K−) ≈ 2.86 GeV/c2 is found to be an admixture of spin-1 and spin-3 resonances. Therefore, the D∗sJ(2860)− state previously observed in inclusive e+ e− → anti-D0 K− X and pp → anti-D0 K− X processes consists of at least two particles. This is the first observation of a heavy flavored spin-3 resonance, and the first time that any spin-3 particle has been seen to be produced in B decays. The masses and widths of the new states and of the D∗s2(2573)− meson are measured, giving the most precise determinations to date.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Observation of Overlapping Spin-1 and Spin-3 anti-D0 K− Resonances at Mass 2.86 GeV/c2. PHYSICAL REVIEW LETTERS, 113(16), 1-9 [10.1103/PhysRevLett.113.162001].

Observation of Overlapping Spin-1 and Spin-3 anti-D0 K− Resonances at Mass 2.86 GeV/c2

CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

The resonant substructure of B0s → anti-D0 K− π+ decays is studied using a data sample corresponding to an integrated luminosity of 3.0 fb^−1 of pp collision data recorded by the LHCb detector. An excess at m(anti-D0 K−) ≈ 2.86 GeV/c2 is found to be an admixture of spin-1 and spin-3 resonances. Therefore, the D∗sJ(2860)− state previously observed in inclusive e+ e− → anti-D0 K− X and pp → anti-D0 K− X processes consists of at least two particles. This is the first observation of a heavy flavored spin-3 resonance, and the first time that any spin-3 particle has been seen to be produced in B decays. The masses and widths of the new states and of the D∗s2(2573)− meson are measured, giving the most precise determinations to date.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Observation of Overlapping Spin-1 and Spin-3 anti-D0 K− Resonances at Mass 2.86 GeV/c2. PHYSICAL REVIEW LETTERS, 113(16), 1-9 [10.1103/PhysRevLett.113.162001].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/357922
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