X(3872) production and absorption in a hot hadron gas
We calculate the time evolution of the X(3872) abundance in the hot hadron gas produced in the late stage of heavy ion collisions. We use effective field Lagrangians to obtain the production and dissociation cross sections of X(3872). In this evaluation we include diagrams involving the anomalous co...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2016-10-01
|
Series: | Physics Letters B |
Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269316304701 |
id |
doaj-5172b0cfd31e4ca18d20e534644eab22 |
---|---|
record_format |
Article |
spelling |
doaj-5172b0cfd31e4ca18d20e534644eab222020-11-24T22:17:44ZengElsevierPhysics Letters B0370-26931873-24452016-10-01761C30330910.1016/j.physletb.2016.08.050X(3872) production and absorption in a hot hadron gasL.M. Abreu0K.P. Khemchandani1A. Martínez Torres2F.S. Navarra3M. Nielsen4Instituto de Física, Universidade Federal da Bahia, 40210-340, Salvador, BA, BrazilFaculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Rod. Presidente Dutra Km 298, Pólo Industrial, 27537-000, Resende, RJ, BrazilInstituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970, São Paulo, SP, BrazilInstituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970, São Paulo, SP, BrazilInstituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970, São Paulo, SP, BrazilWe calculate the time evolution of the X(3872) abundance in the hot hadron gas produced in the late stage of heavy ion collisions. We use effective field Lagrangians to obtain the production and dissociation cross sections of X(3872). In this evaluation we include diagrams involving the anomalous couplings πD⁎D¯⁎ and XD¯⁎D⁎ and also the couplings of the X(3872) with charged D and D⁎ mesons. With these new terms the X(3872) interaction cross sections are much larger than those found in previous works. Using these cross sections as input in rate equations, we conclude that during the expansion and cooling of the hadronic gas, the number of X(3872), originally produced at the end of the mixed QGP/hadron gas phase, is reduced by a factor of 4.http://www.sciencedirect.com/science/article/pii/S0370269316304701 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L.M. Abreu K.P. Khemchandani A. Martínez Torres F.S. Navarra M. Nielsen |
spellingShingle |
L.M. Abreu K.P. Khemchandani A. Martínez Torres F.S. Navarra M. Nielsen X(3872) production and absorption in a hot hadron gas Physics Letters B |
author_facet |
L.M. Abreu K.P. Khemchandani A. Martínez Torres F.S. Navarra M. Nielsen |
author_sort |
L.M. Abreu |
title |
X(3872) production and absorption in a hot hadron gas |
title_short |
X(3872) production and absorption in a hot hadron gas |
title_full |
X(3872) production and absorption in a hot hadron gas |
title_fullStr |
X(3872) production and absorption in a hot hadron gas |
title_full_unstemmed |
X(3872) production and absorption in a hot hadron gas |
title_sort |
x(3872) production and absorption in a hot hadron gas |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 1873-2445 |
publishDate |
2016-10-01 |
description |
We calculate the time evolution of the X(3872) abundance in the hot hadron gas produced in the late stage of heavy ion collisions. We use effective field Lagrangians to obtain the production and dissociation cross sections of X(3872). In this evaluation we include diagrams involving the anomalous couplings πD⁎D¯⁎ and XD¯⁎D⁎ and also the couplings of the X(3872) with charged D and D⁎ mesons. With these new terms the X(3872) interaction cross sections are much larger than those found in previous works. Using these cross sections as input in rate equations, we conclude that during the expansion and cooling of the hadronic gas, the number of X(3872), originally produced at the end of the mixed QGP/hadron gas phase, is reduced by a factor of 4. |
url |
http://www.sciencedirect.com/science/article/pii/S0370269316304701 |
work_keys_str_mv |
AT lmabreu x3872productionandabsorptioninahothadrongas AT kpkhemchandani x3872productionandabsorptioninahothadrongas AT amartineztorres x3872productionandabsorptioninahothadrongas AT fsnavarra x3872productionandabsorptioninahothadrongas AT mnielsen x3872productionandabsorptioninahothadrongas |
_version_ |
1725784726746169344 |