Determination of spin and parity of D^*_(s) mesons

2023/05/24 by BESIII Collaboration, Ablikim, M., Achasov, M. N. +611
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.2305.14631

Abstract

The spin and parity of the charmed mesons D_s^*+, D^*0 and D^*+ are determined for the first time to be J^P=1^- with significances greater than 10σ over other hypotheses of 2⁺ and 3^-, using an e⁺e^- collision data sample with an integrated luminosity of 3.19 fb^-1 collected by the BESIII detector at a center-of-mass energy of 4.178 GeV. Different spin-parity hypotheses for D_s^*+, D^*0, and D^*+ mesons are tested via a helicity amplitude analysis of the processes e⁺e^-→ D^*+_sD^-_s, D^*0D⁰ and D^*+D^-, with D^*+_s→ D⁺_s γ, D^*0→ D⁰π⁰, and D^*+→ D⁺π⁰. The results confirm the quark model predictions.

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