QCD sum rules study of QQ-(u)over-bar(d)over-bar mesons

被引：153
作者：
Navarra, Fernando S.
Nielsen, Marina
Lee, Su Houng
机构：
[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil
[2] Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea
来源：
PHYSICS LETTERS B | 2007年 / 649卷 / 2-3期
基金：
巴西圣保罗研究基金会;
关键词：
D O I：
10.1016/j.physletb.2007.04.010
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We use QCD sum rules to study the possible existence of QQ - (u) over bar(d) over bar mesons, assumed to be a state with J(P) = 1(+). For definiteness, we work with a current with an axial heavy diquark and a scalar light anti-diquark, at leading order in alpha(s). We consider the contributions of condensates up to dimension eight. For the b-quark, we predict M-Tbb = (10.2 +/- 0.3) GeV, which is below the (B) over bar(B) over bar* threshold. For the c-quark, we predict M-Tcc = (4.0 +/- 0.2) GeV, in agreement with quark model predictions. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：166 / 172
页数：7
相关论文
共 43 条
[1]   HEAVY-QUARK EXPANSION, FACTORIZATION AND 8-DIMENSIONAL GLUON CONDENSATES [J].
BAGAN, E ;
LATORRE, JI ;
PASCUAL, P ;
TARRACH, R .
NUCLEAR PHYSICS B, 1985, 254 (3-4) :555-568
[2]   Chiral multiplets of heavy-light mesons [J].
Bardeen, WA ;
Eichten, EJ ;
Hill, CT .
PHYSICAL REVIEW D, 2003, 68 (05)
[3]   Disentangling two- and four-quark state pictures of the charmed scalar mesons [J].
Bracco, ME ;
Lozea, A ;
Matheus, RD ;
Navarra, FS ;
Nielsen, M .
PHYSICS LETTERS B, 2005, 624 (3-4) :217-222
[4]   QCD sum rule approach for the light scalar mesons as four-quark states [J].
Brito, TV ;
Navarra, FS ;
Nielsen, M ;
Bracco, ME .
PHYSICS LETTERS B, 2005, 608 (1-2) :69-76
[5]   Exotic tetraquark udss of JP=0+ in the QCD sum rule [J].
Chen, Hua-Xing ;
Hosaka, Atsushi ;
Zhu, Shi-Lin .
PHYSICAL REVIEW D, 2006, 74 (05)
[6]   SEMILEPTONIC DECAYS OF HEAVY TETRAQUARKS [J].
CHOW, CK .
PHYSICAL REVIEW D, 1995, 51 (07) :3541-3543
[7]  
Cui Y, 2007, HIGH ENERG PHYS NUC, V31, P7
[8]   Understanding the DsJ+(2317) and DsJ+(2460) with sum rules in heavy quark effective theory -: art. no. 114011 [J].
Dai, YB ;
Huang, CS ;
Liu, C ;
Zhu, SL .
PHYSICAL REVIEW D, 2003, 68 (11)
[9]   THE HEAVY-QUARK EXPANSION AND QCD SUM-RULES FOR LIGHT QUARKS [J].
GENERALIS, SC ;
BROADHURST, DJ .
PHYSICS LETTERS B, 1984, 139 (1-2) :85-89
[10]   Testing the nature of the D*sj (2317)+ and Ds J(2463)+ states using radiative transitions [J].
Godfrey, S .
PHYSICS LETTERS B, 2003, 568 (3-4) :254-260
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