Isospin-violating strong decays of scalar single-heavy tetraquarks
| Parent link: | Physical Review D: particles, fields, gravitation, and cosmology.— , 1970- Vol. 94, iss. 9.— 2016.— [094012, 8 p.] |
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| Ente Autore: | |
| Altri autori: | , , , |
| Riassunto: | Title screen We present a study of the isospin-violating one-pion strong decays of single heavy tetraquarks XQ=X(sqq¯Q¯), Q=c, b, and q=u, d with spin-parity JP=0+. We assume that the tetraquarks have the configuration of a color diquark and an antidiquark. Three mechanisms of isospin violation can contribute to the decay rate: (1) mixing of the X(suu¯Q¯) and X(sdd¯Q¯) tetraquark currents, (2) an explicit md−mu quark mass difference in the quark diagrams describing the corresponding decay transitions, and (3) π0−η mixing in the final state. Our main results are as follows: (1) It is quite likely that the investigated tetraquark states are isosinglet states with a small admixture of an isotriplet component; (2) The first isospin-breaking mechanism affects the decay rather more significantly than the others; (3) Our calculations contain a size parameter ΛXQ, characterizing the distribution of the quarks in the tetraquark state XQ. Absolute decay rates depend very much on the choice of ΛXQ, varied from 1 to 2 GeV, reflecting the compactness of the multiquark system. Режим доступа: по договору с организацией-держателем ресурса |
| Lingua: | inglese |
| Pubblicazione: |
2016
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| Soggetti: | |
| Accesso online: | https://doi.org/10.1103/PhysRevD.94.094012 |
| Natura: | Elettronico Capitolo di libro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=652289 |
MARC
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| 200 | 1 | |a Isospin-violating strong decays of scalar single-heavy tetraquarks |f Th. Gutsche [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 330 | |a We present a study of the isospin-violating one-pion strong decays of single heavy tetraquarks XQ=X(sqq¯Q¯), Q=c, b, and q=u, d with spin-parity JP=0+. We assume that the tetraquarks have the configuration of a color diquark and an antidiquark. Three mechanisms of isospin violation can contribute to the decay rate: (1) mixing of the X(suu¯Q¯) and X(sdd¯Q¯) tetraquark currents, (2) an explicit md−mu quark mass difference in the quark diagrams describing the corresponding decay transitions, and (3) π0−η mixing in the final state. Our main results are as follows: (1) It is quite likely that the investigated tetraquark states are isosinglet states with a small admixture of an isotriplet component; (2) The first isospin-breaking mechanism affects the decay rather more significantly than the others; (3) Our calculations contain a size parameter ΛXQ, characterizing the distribution of the quarks in the tetraquark state XQ. Absolute decay rates depend very much on the choice of ΛXQ, varied from 1 to 2 GeV, reflecting the compactness of the multiquark system. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Physical Review D |o particles, fields, gravitation, and cosmology |d 1970- | ||
| 463 | |t Vol. 94, iss. 9 |v [094012, 8 p.] |d 2016 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a изоспин | |
| 610 | 1 | |a нарушение | |
| 610 | 1 | |a распады | |
| 701 | 1 | |a Gutsche |b Th. |g Thomas | |
| 701 | 1 | |a Ivanov |b M. A. |g Mikhail Alekseevich | |
| 701 | 1 | |a Korner |b J. G. |g Jurgen | |
| 701 | 1 | |a Lyubovitskiy (Lyubovitskij) |b V. E. |c physicist |c Professor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences, Professor of the University of Tubingen (Germany) |f 1963- |g Valery Efimovich |3 (RuTPU)RU\TPU\pers\33385 |9 17080 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Физико-технический институт |b Кафедра высшей математики и математической физики |3 (RuTPU)RU\TPU\col\18727 |9 27176 |
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| 856 | 4 | |u https://doi.org/10.1103/PhysRevD.94.094012 | |
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