Tetraquarks in holographic QCD

被引：19

作者：

Gutsche, Thomas ^{[1
]}

Lyubovitskij, Valery E. ^{[1
,2
,3
,4
,5
]}

Schmidt, Ivan ^{[2
,3
]}

机构：

[1] Univ Tubingen, Kepler Ctr Astro & Particle Phys, Inst Theoret Physik, Morgenstelle 14, D-72076 Tubingen, Germany

[2] Univ Tecn Feder Santa Maria, Dept Fis, Casilla 110-V, Valparaiso, Chile

[3] Univ Tecn Feder Santa Maria, Ctr Cient Tecnol Valparaiso CCTVal, Casilla 110-V, Valparaiso, Chile

[4] Tomsk State Univ, Dept Phys, Tomsk 634050, Russia

[5] Tomsk Polytech Univ, Lab Particle Phys, Tomsk 634050, Russia

来源：

PHYSICAL REVIEW D | 2017年 / 96卷 / 03期

关键词：

LIGHT; MODEL;

D O I：

10.1103/PhysRevD.96.034030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using a soft-wall AdS/QCD approach we derive the SchrOdinger-type equation of motion for the tetraquark wave function, which is dual to the dimension-4 AdS bulk profile. The latter coincides with the number of constituents in the leading Fock state of the tetraquark. The obtained equation of motion is solved analytically, providing predictions for both the tetraquark wave function and its mass. A low mass limit for possible tetraquark states is given by M >= 2 kappa = 1 GeV, where kappa = 0.5 GeV is the typical value of the scale parameter in soft-wall AdS/QCD. We confirm results of the COMPASS Collaboration recently reported on the discovery of the a(1)(1414) state, interpreted as a tetraquark state composed of light quarks and having J(PC) = 1(++). Our prediction for the mass of this state, M-a1 = root 2 GeV similar or equal to 1.414 GeV, is in good agreement with the COMPASS result M-a1 = 1.414(-0.013)(+0.015) GeV. Next we included finite quark mass effects, which are essential for the tetraquark states involving heavy quarks.

引用

页数：11

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