Test of the multiquark structure of a1(1420) in strong two-body decays; Physical Review D; Vol. 96, iss. 11
| Parent link: | Physical Review D: particles, fields, gravitation, and cosmology.— , 1970- Vol. 96, iss. 11.— 2017.— [114004, 10 p.] |
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| Kolejni autorzy: | , , , , |
| Streszczenie: | Title screen 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. Режим доступа: по договору с организацией-держателем ресурса |
| Język: | angielski |
| Wydane: |
2017
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| Hasła przedmiotowe: | |
| Dostęp online: | https://doi.org/10.1103/PhysRevD.96.114004 |
| Format: | Elektroniczne Rozdział |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658077 |
| Streszczenie: | Title screen 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. Режим доступа: по договору с организацией-держателем ресурса |
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| DOI: | 10.1103/PhysRevD.96.114004 |