Test of the multiquark structure of a1(1420) in strong two-body decays

Test of the multiquark structure of a1(1420) in strong two-body decays

Bibliographic Details
Parent link:Physical Review D: particles, fields, gravitation, and cosmology.— , 1970-
Vol. 96, iss. 11.— 2017.— [114004, 10 p.]
Corporate Author: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Other Authors: Gutsche T. Thomas, Ivanov M. A. Mikhail, Korner J. G. Jurgen, Lyubovitskiy (Lyubovitskij) V. E. Valery Efimovich, Xu Kai
Summary: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
Language:English
Published: 2017
Subjects:
электронный ресурс
труды учёных ТПУ
тетракварки
анализ
распад
Online Access:https://doi.org/10.1103/PhysRevD.96.114004
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658077

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