A calculation of the sigma meson mass in nuclear matter

J. R. Morones-Ibarra, Ayax Santos-Guevara

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We calculate the mass and width of the crσ-meson in nuclear medium by considering that it couples to two virtual pions and to a pair of nucleonantinucleon states and to particle-hole states. The mass is calculated by using the spectral function in the Walecka model, finding that it is about 520 MeV. In addition, we have obtained the value of 700 MeV for the width of its spectral function, showing that it has increased respect to that in vacuum. We find that there is a reduction in the mass value compared with that in vacuum. This result is consistent with those reported by other authors who have used different models predicting a decreasing of the mass as a function of the density.
Original languageEnglish
Pages (from-to)2553-2563
Number of pages11
JournalActa Physica Polonica B
Publication statusPublished - 1 Jan 2007
Externally publishedYes

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sigma-mesons
vacuum
pions
mesons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "We calculate the mass and width of the crσ-meson in nuclear medium by considering that it couples to two virtual pions and to a pair of nucleonantinucleon states and to particle-hole states. The mass is calculated by using the spectral function in the Walecka model, finding that it is about 520 MeV. In addition, we have obtained the value of 700 MeV for the width of its spectral function, showing that it has increased respect to that in vacuum. We find that there is a reduction in the mass value compared with that in vacuum. This result is consistent with those reported by other authors who have used different models predicting a decreasing of the mass as a function of the density.",
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A calculation of the sigma meson mass in nuclear matter. / Morones-Ibarra, J. R.; Santos-Guevara, Ayax.

In: Acta Physica Polonica B, 01.01.2007, p. 2553-2563.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A calculation of the sigma meson mass in nuclear matter

AU - Morones-Ibarra, J. R.

AU - Santos-Guevara, Ayax

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Y1 - 2007/1/1

N2 - We calculate the mass and width of the crσ-meson in nuclear medium by considering that it couples to two virtual pions and to a pair of nucleonantinucleon states and to particle-hole states. The mass is calculated by using the spectral function in the Walecka model, finding that it is about 520 MeV. In addition, we have obtained the value of 700 MeV for the width of its spectral function, showing that it has increased respect to that in vacuum. We find that there is a reduction in the mass value compared with that in vacuum. This result is consistent with those reported by other authors who have used different models predicting a decreasing of the mass as a function of the density.

AB - We calculate the mass and width of the crσ-meson in nuclear medium by considering that it couples to two virtual pions and to a pair of nucleonantinucleon states and to particle-hole states. The mass is calculated by using the spectral function in the Walecka model, finding that it is about 520 MeV. In addition, we have obtained the value of 700 MeV for the width of its spectral function, showing that it has increased respect to that in vacuum. We find that there is a reduction in the mass value compared with that in vacuum. This result is consistent with those reported by other authors who have used different models predicting a decreasing of the mass as a function of the density.

M3 - Article

SP - 2553

EP - 2563

JO - Acta Physica Polonica B

JF - Acta Physica Polonica B

SN - 0587-4254

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