D meson mass increase by restoration of chiral symmetry in nuclear matter

被引：36

作者：

Suzuki, Kei ^{[1
]}

Gubler, Philipp ^{[2
]}

Oka, Makoto ^{[3
,4
]}

机构：

[1] RIKEN, Nishina Ctr, Theoret Res Div, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[2] ECT, I-38123 Villazzano, Trento, Italy

[3] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan

[4] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

来源：

PHYSICAL REVIEW C | 2016年 / 93卷 / 04期

基金：

日本学术振兴会;

关键词：

QCD SUM-RULES; VECTOR-MESONS; RHO-MESON; RESONANCE PHYSICS; FINITE-DENSITY; OMEGA-MESON; ENERGIES; CHARM; QUARK;

D O I：

10.1103/PhysRevC.93.045209

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：

Spectral functions of the pseudoscalar D meson in the nuclear medium are analyzed using QCD sum rules and the maximum entropy method. This approach enables us to extract the spectral functions without any phenomenological assumption, and thus to visualize in-medium modification of the spectral functions directly. It is found that the reduction of the chiral condensates of dimension 3 and 5 causes the masses of both D+ and D- mesons to grow gradually at finite density. Additionally, we construct charge-conjugate-projected sum rules and find a D+-D- mass splitting of about -15 MeV at nuclear saturation density.

引用

页数：11

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