The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances

We perform a theoretical study of the χcJ→ϕK⁎K¯→ϕKπK¯ reaction taking into account the K⁎K¯ final state interaction, which in the chiral unitary approach is responsible, together with its coupled channels, for the formation of the low lying axial vector mesons, in this case the h1(1380) given the se...

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Main Authors:	Sheng-Juan Jiang, S. Sakai, Wei-Hong Liang, E. Oset
Format:	Article
Language:	English
Published:	Elsevier 2019-10-01
Series:	Physics Letters B
Online Access:	http://www.sciencedirect.com/science/article/pii/S0370269319305453

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record_format	Article
spelling	doaj-ee0405b70f5541739066082fe15717a72020-11-25T02:39:33ZengElsevierPhysics Letters B0370-26932019-10-01797The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonancesSheng-Juan Jiang0S. Sakai1Wei-Hong Liang2E. Oset3Department of Physics, Guangxi Normal University, Guilin 541004, China; Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, Guilin 541004, ChinaInstitute of Theoretical Physics, CAS, Zhong Guan Cun East Street 55, 100190 Beijing, ChinaDepartment of Physics, Guangxi Normal University, Guilin 541004, China; Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, Guilin 541004, China; Corresponding author.Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia - CSIC, Institutos de Investigación de Paterna, Aptdo. 22085, 46071 Valencia, Spain; Department of Physics, Guangxi Normal University, Guilin 541004, ChinaWe perform a theoretical study of the χcJ→ϕK⁎K¯→ϕKπK¯ reaction taking into account the K⁎K¯ final state interaction, which in the chiral unitary approach is responsible, together with its coupled channels, for the formation of the low lying axial vector mesons, in this case the h1(1380) given the selection of quantum numbers. Based on this picture we can easily explain why in the χc0 decay the h1(1380) resonance is not produced, and, in the case of χc1 and χc2 decay, why a dip in the K+π0K− mass distribution appears in the 1550-1600 MeV region, that in our picture comes from a destructive interference between the tree level mechanism and the rescattering that generates the h1(1380) state. Such a dip is not reproduced in pictures where the nominal h1(1380) signal is added incoherently to a background, which provides support to the picture where the resonance appears from rescattering of vector-pseudoscalar components.http://www.sciencedirect.com/science/article/pii/S0370269319305453
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Sheng-Juan Jiang S. Sakai Wei-Hong Liang E. Oset
spellingShingle	Sheng-Juan Jiang S. Sakai Wei-Hong Liang E. Oset The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances Physics Letters B
author_facet	Sheng-Juan Jiang S. Sakai Wei-Hong Liang E. Oset
author_sort	Sheng-Juan Jiang
title	The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances
title_short	The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances
title_full	The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances
title_fullStr	The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances
title_full_unstemmed	The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances
title_sort	χcj decay to ϕk⁎k¯,ϕh1(1380) testing the nature of axial vector meson resonances
publisher	Elsevier
series	Physics Letters B
issn	0370-2693
publishDate	2019-10-01
description	We perform a theoretical study of the χcJ→ϕK⁎K¯→ϕKπK¯ reaction taking into account the K⁎K¯ final state interaction, which in the chiral unitary approach is responsible, together with its coupled channels, for the formation of the low lying axial vector mesons, in this case the h1(1380) given the selection of quantum numbers. Based on this picture we can easily explain why in the χc0 decay the h1(1380) resonance is not produced, and, in the case of χc1 and χc2 decay, why a dip in the K+π0K− mass distribution appears in the 1550-1600 MeV region, that in our picture comes from a destructive interference between the tree level mechanism and the rescattering that generates the h1(1380) state. Such a dip is not reproduced in pictures where the nominal h1(1380) signal is added incoherently to a background, which provides support to the picture where the resonance appears from rescattering of vector-pseudoscalar components.
url	http://www.sciencedirect.com/science/article/pii/S0370269319305453
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The χcJ decay to ϕK⁎K¯,ϕh1(1380) testing the nature of axial vector meson resonances

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