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Pseudoscalar and vector open-charm mesons at finite temperature

Glòria Montaña (Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos (ICCUB), Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain) ; Àngels Ramos (Departament de Física Quàntica i Astrofísica and Institut de Ciències del Cosmos (ICCUB), Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain) ; Laura Tolos (Institut für Theoretische Physik, Goethe Universität Frankfurt, Max von Laue Strasse 1, 60438 Frankfurt, Germany; Frankfurt Institute for Advanced Studies, Ruth-Moufang-Str. 1, 60438 Frankfurt am Main, Germany; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, 08193 Barcelona, Spain; Institut d’Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain) ; Juan M. Torres-Rincon (Institut für Theoretische Physik, Goethe Universität Frankfurt, Max von Laue Strasse 1, 60438 Frankfurt, Germany)

Vacuum and thermal properties of pseudoscalar and vector charm mesons are analyzed within a self-consistent many-body approach, employing a chiral effective field theory that incorporates heavy-quark spin symmetry. Upon unitarization of the vacuum interaction amplitudes for the scattering of charm mesons off light mesons in a fully coupled-channel basis, new dynamically generated states are searched. The imaginary-time formalism is employed to extend the calculation to finite temperatures up to T=150MeV. Medium-modified spectral shapes of the D, D*, Ds, and D*s mesons are provided. The temperature dependence of the masses and decay widths of the nonstrange D*0(2300) and D*1(2430) mesons, both showing a double-pole structure in the complex-energy plane, is also reported, as well as that of the D*s0(2317) and D*s1(2460) resonances and other states not yet identified experimentally. Being the first calculation incorporating open-charm vector mesons at finite temperature in a self-consistent fashion, it brings up the opportunity to discuss the medium effects on the open-charm sector under the perspective of chiral and heavy-quark spin symmetries.

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      "title": "Pseudoscalar and vector open-charm mesons at finite temperature"
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      "source": "APS", 
      "value": "Vacuum and thermal properties of pseudoscalar and vector charm mesons are analyzed within a self-consistent many-body approach, employing a chiral effective field theory that incorporates heavy-quark spin symmetry. Upon unitarization of the vacuum interaction amplitudes for the scattering of charm mesons off light mesons in a fully coupled-channel basis, new dynamically generated states are searched. The imaginary-time formalism is employed to extend the calculation to finite temperatures up to <math><mrow><mi>T</mi><mo>=</mo><mn>150</mn><mtext> </mtext><mtext> </mtext><mi>MeV</mi></mrow></math>. Medium-modified spectral shapes of the <math><mi>D</mi></math>, <math><msup><mi>D</mi><mo>*</mo></msup></math>, <math><msub><mi>D</mi><mi>s</mi></msub></math>, and <math><msubsup><mi>D</mi><mi>s</mi><mo>*</mo></msubsup></math> mesons are provided. The temperature dependence of the masses and decay widths of the nonstrange <math><mrow><mrow><msubsup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow><mrow><mo>*</mo></mrow></msubsup></mrow><mo>(</mo><mn>2300</mn><mo>)</mo></mrow></math> and <math><mrow><mrow><msubsup><mrow><mi>D</mi></mrow><mrow><mn>1</mn></mrow><mrow><mo>*</mo></mrow></msubsup></mrow><mo>(</mo><mn>2430</mn><mo>)</mo></mrow></math> mesons, both showing a double-pole structure in the complex-energy plane, is also reported, as well as that of the <math><mrow><msubsup><mrow><mi>D</mi></mrow><mrow><mi>s</mi><mn>0</mn></mrow><mrow><mo>*</mo></mrow></msubsup><mo>(</mo><mn>2317</mn><mo>)</mo></mrow></math> and <math><mrow><msubsup><mrow><mi>D</mi></mrow><mrow><mi>s</mi><mn>1</mn></mrow><mrow><mo>*</mo></mrow></msubsup><mo>(</mo><mn>2460</mn><mo>)</mo></mrow></math> resonances and other states not yet identified experimentally. Being the first calculation incorporating open-charm vector mesons at finite temperature in a self-consistent fashion, it brings up the opportunity to discuss the medium effects on the open-charm sector under the perspective of chiral and heavy-quark spin symmetries."
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Published on:
20 November 2020
Publisher:
APS
Published in:
Physical Review D , Volume 102 (2020)
Issue 9
DOI:
https://doi.org/10.1103/PhysRevD.102.096020
arXiv:
2007.12601
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

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