Test of the multiquark structure of a1(1420) in strong two-body decays / T. Gutsche [et al.]
Уровень набора: Physical Review D, particles, fields, gravitation, and cosmology = 1970-Язык: английский.Страна: .Резюме или реферат: We present an analysis of strong two-body decays of the a1(1420) with JPC=1++ recently reported by the COMPASS Collaboration at CERN. Following the interpretation of the COMPASS Collaboration that the a1 is an unusual state with a four-quark q¯qs¯s structure we consider two possible configurations for this state-hadronic molecular and color diquark-antidiquark structures. We find that the dominant decay mode of the a1 is the decay into K and K∗. In particular, we calculate that the four decay modes a1→VP with VP=K*±K∓, K*0¯K0, ¯K*0K0 together give a dominant contribution to the measured total width of about 150 MeV. The observational mode a1→f0(980)+π0 is significantly suppressed by one order of magnitude..Примечания о наличии в документе библиографии/указателя: [References: 24 tit.].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | тетракварки | анализ | распад Ресурсы он-лайн:Щелкните здесь для доступа в онлайнTitle screen
[References: 24 tit.]
We present an analysis of strong two-body decays of the a1(1420) with JPC=1++ recently reported by the COMPASS Collaboration at CERN. Following the interpretation of the COMPASS Collaboration that the a1 is an unusual state with a four-quark q¯qs¯s structure we consider two possible configurations for this state-hadronic molecular and color diquark-antidiquark structures. We find that the dominant decay mode of the a1 is the decay into K and K∗. In particular, we calculate that the four decay modes a1→VP with VP=K*±K∓, K*0¯K0, ¯K*0K0 together give a dominant contribution to the measured total width of about 150 MeV. The observational mode a1→f0(980)+π0 is significantly suppressed by one order of magnitude.
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