Spectral properties of mesons in hot and dense matter from energy weighted sum rules

被引：0

作者：

Cabrera, D. ^{[1
]}

Polls, A. ^{[2
]}

Ramos, A. ^{[2
]}

Tolos, L. ^{[3
]}

机构：

[1] Univ Complutense, Dept Fis Teor 2, E-28040 Madrid, Spain

[2] Univ Barcelona, E-08007 Barcelona, Spain

[3] Univ Groningen, YNL-9700 AB Groningen, Netherlands

来源：

INTERNATIONAL WORKSHOP ON CHIRAL SYMMETRY IN HADRONS AND NUCLEI | 2010年 / 1322卷

关键词：

meson spectral function; sum rules; nuclear matter; finite temperature; NUCLEAR-MATTER; MODES;

D O I：

暂无

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Energy weighted sum rules for the spectral function of mesons are derived, both in cold nuclear matter and at finite temperature, by matching the Dyson propagator with its spectral Lehmann representation at low and high energies. We illustrate our results by calculating the sum rules for specific models of the kaon and pion self-energy in a nuclear medium. We find satisfactory results from the lower energy weight sum rules, which reflect the contributions from the different quasi-particle and collective modes of the meson spectral function, and show examples of the sensitivity of the sum rules to model approximations. Finally, we discuss applications in asymmetric nuclear matter and in the study of the spectral properties of vector mesons.

引用

页码：344 / +

页数：2

共 9 条

[1] Energy-weighted sum rules for mesons in hot and dense matter
Cabrera, D.
Polls, A.
Ramos, A.
Tolos, L.
[J]. PHYSICAL REVIEW C, 2009, 80 (04):
[2] In-medium nuclear interactions of low-energy hadrons
Friedman, E.
Gal, A.
[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2007, 452 (4-5): : 89 - 153
[3] Kaon production in heavy ion reactions at intermediate energies
Fuchs, C
[J]. PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 56, NO 1, 2006, 56 (01): : 1 - 103
[4] PIONIC MODES OF EXCITATION IN NUCLEI
OSET, E
TOKI, H
WEISE, W
[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1982, 83 (04): : 281 - 380
[5] DECAY MODES OF SIGMA-HYPERNUCLEI AND LAMBDA-HYPERNUCLEI
OSET, E
DECORDOBA, PF
SALCEDO, LL
BROCKMANN, R
[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1990, 188 (02): : 79 - 145
[6] ENERGY WEIGHTED SUM-RULES FOR SPECTRAL FUNCTIONS IN NUCLEAR-MATTER
POLLS, A
RAMOS, A
VENTURA, J
AMARI, S
DICKHOFF, WH
[J]. PHYSICAL REVIEW C, 1994, 49 (06) : 3050 - 3060
[7] Rapp R, 2000, ADV NUCL PHYS, V25, P1
[8] Chiral approach to antikaon s- and p-wave interactions in dense nuclear matter
Tolos, L.
Ramos, A.
Oset, E.
[J]. PHYSICAL REVIEW C, 2006, 74 (01):
[9] Strange mesons in nuclear matter at finite temperature
Tolos, L.
Cabrera, D.
Ramos, A.
[J]. PHYSICAL REVIEW C, 2008, 78 (04)

← 1 →