Double charm states in QCD sum rules

被引：1

作者：

Navarra, Fernando S. ^{[1
]}

Nielsen, Marina ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil

来源：

3RD INTERNATIONAL CONFERENCE ON HADRON PHYSICS (TROIA'11) | 2012年 / 348卷

关键词：

BOUND-STATES; HEAVY TETRAQUARKS; QUARK MODELS; MESONS;

D O I：

10.1088/1742-6596/348/1/012008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this note we revisit and improve the calculation of the T-cc mass using the double ratio of QCD sum rules (QCDSR), assuming that this state is described by a molecular current. In a previous work we used a tetraquark current. We conclude that with both currents we arrive at nearly the same results for the T-cc mass, which turns out to be close to the mass of the X(3872).

引用

页数：5

共 18 条

[1] Tetraquarks with heavy flavors [J].

Brink, DM ;

Stancu, F .

PHYSICAL REVIEW D, 1998, 57 (11) :6778-6787

[2] ABSENCE OF EXOTIC HADRONS IN FLUX-TUBE QUARK MODELS [J].

CARLSON, J ;

PANDHARIPANDE, VR .

PHYSICAL REVIEW D, 1991, 43 (05) :1652-1658

[3] SEMILEPTONIC DECAYS OF HEAVY TETRAQUARKS [J].

CHOW, CK .

PHYSICAL REVIEW D, 1995, 51 (07) :3541-3543

[4]

Cui Y, 2007, HIGH ENERG PHYS NUC, V31, P7

[5] Relation between Tcc,bb and Xc,b from QCD [J].

Dias, J. M. ;

Narison, S. ;

Navarra, F. S. ;

Nielsen, M. ;

Richard, J. -M. .

PHYSICS LETTERS B, 2011, 703 (03) :274-280

[6] The Tcc = DD* molecular state [J].

Janc, D ;

Rosina, M .

FEW-BODY SYSTEMS, 2004, 35 (3-4) :175-196

[7]

LIPKIN HJ, 1986, PHYS LETT B, V172, P242, DOI 10.1016/0370-2693(86)90843-9

[8] Can the X(3872) be a 1++ four-quark state? [J].

Matheus, R. D. ;

Narison, S. ;

Nielsen, M. ;

Richard, J. -M. .

PHYSICAL REVIEW D, 2007, 75 (01)

[9] Nature of the X(3872) from QCD [J].

Narison, S. ;

Navarra, F. S. ;

Nielsen, M. .

PHYSICAL REVIEW D, 2011, 83 (01)

[10] QCD sum rules study of QQ-(u)over-bar(d)over-bar mesons [J].

Navarra, Fernando S. ;

Nielsen, Marina ;

Lee, Su Houng .

PHYSICS LETTERS B, 2007, 649 (2-3) :166-172

← 1 2 →