Chiral symmetry and QCD sum rules for the nucleon mass in matter

被引：12

作者：

Birse, MC ^{[1
]}

Krippa, B ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST NUCL RES,MOSCOW 117312,RUSSIA

来源：

PHYSICS LETTERS B | 1996年 / 381卷 / 04期

关键词：

chiral symmetry; nucleon mass; nuclear matter; QCD sum rules; condensates; pion-nucleon sigma commutator;

D O I：

10.1016/0370-2693(96)00636-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The quark condensate in nuclear matter contains a term of order rho m(pi), arising from the contribution of low-momentum virtual pions to the pi N sigma commutator. Standard treatments of QCD sum rules for a nucleon in matter generate a similar term in the nucleon effective mass, although this is inconsistent with chiral perturbation theory. We show how an improved treatment of pionic contributions on the phenomenological side of the sum rules can cancel out this unwanted piece. Our results also show that factorisation ansatz for the four-quark condensate cannot be valid in matter.

引用

页码：397 / 401

页数：5

共 50 条

[21] QCD sum rules for nucleon-nucleon and hyperon-nucleon interactions
Kondo, Y
Morimatsu, O
NUCLEAR PHYSICS A, 2000, 670 : 311C - 314C
[22] QCD sum rule for nucleon in nuclear matter
Mallik, S.
Sarkar, Sourav
EUROPEAN PHYSICAL JOURNAL C, 2010, 65 (1-2): : 247 - 255
[23] QCD sum rule for nucleon in nuclear matter
S. Mallik
Sourav Sarkar
The European Physical Journal C, 2010, 65 : 247 - 255
[24] NUCLEON-NUCLEON-SCATTERING LENGTHS IN QCD SUM-RULES
KONDO, Y
MORIMATSU, O
PHYSICAL REVIEW LETTERS, 1993, 71 (18) : 2855 - 2858
[25] Unitary symmetry pattern of the QCD sum rules
Aliev, T.
Ozpineci, A.
Zamiralov, V.
3RD INTERNATIONAL CONFERENCE ON HADRON PHYSICS (TROIA'11), 2012, 348
[26] Symmetry energy from QCD sum rules
Jeong, Kie Sang
Lee, Su Houng
EUROPEAN PHYSICAL JOURNAL A, 2014, 50 (02): : 1 - 8
[27] Symmetry energy from QCD sum rules
Kie Sang Jeong
Su Houng Lee
The European Physical Journal A, 2014, 50
[28] Tensor charge of the nucleon from QCD sum rules
He, HX
CHINESE PHYSICS LETTERS, 1996, 13 (12): : 889 - 892
[29] Role of unphysical solution in nucleon QCD sum rules
Drukarev, E. G.
Ryskin, M. G.
Sadovnikova, V. A.
PHYSICAL REVIEW D, 2009, 80 (01)
[30] Few-nucleon systems and QCD sum rules
Hwang, WYP
NUCLEAR PHYSICS A, 2001, 684 : 167C - 174C

← 1 2 3 4 5 →