Pion form factor from a contact interaction

被引：99

作者：

Gutierrez-Guerrero, L. X. ^{[1
]}

Bashir, A. ^{[1
]}

Cloet, I. C. ^{[2
]}

Roberts, C. D. ^{[3
,4
]}

机构：

[1] Univ Michoacana, Inst Fis & Matemat, Morelia 58040, Michoacan, Mexico

[2] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[3] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[4] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

来源：

PHYSICAL REVIEW C | 2010年 / 81卷 / 06期

基金：

美国国家科学基金会;

关键词：

DYSON; THEOREM;

D O I：

10.1103/PhysRevC.81.065202

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：

In a Poincare-covariant vector-boson-exchange theory, the pion possesses components of pseudovector origin, which materially influence its observable properties. For a range of such quantities, we explore the consequences of a momentum-independent interaction, regularized in a symmetry-preserving manner. The contact interaction, while capable of describing pion static properties, produces a form factor whose evolution for Q(2) > 0.17 GeV2 disagrees markedly with experiment and whose asymptotic power-law behavior conflicts strongly with perturbative QCD.

引用

页数：5

共 25 条

[1] Review of particle physics [J].

Amsler, C. ;

Doser, M. ;

Antonelli, M. ;

Asner, D. M. ;

Babu, K. S. ;

Baer, H. ;

Band, H. R. ;

Barnett, R. M. ;

Bergren, E. ;

Beringer, J. ;

Bernardi, G. ;

Bertl, W. ;

Bichsel, H. ;

Biebel, O. ;

Bloch, P. ;

Blucher, E. ;

Blusk, S. ;

Cahn, R. N. ;

Carena, M. ;

Caso, C. ;

Cecccci, A. ;

Chakraborty, D. ;

Chen, M. -C. ;

Chivukula, R. S. ;

Cowan, G. ;

Dahl, O. ;

D'Ambrosio, G. ;

Damour, T. ;

de Gouvea, A. ;

DeGrand, T. ;

Dobrescu, B. ;

Drees, M. ;

Edwards, D. A. ;

Eidelman, S. ;

Elvira, V. D. ;

Erler, J. ;

Ezhela, V. V. ;

Feng, J. L. ;

Fetscher, W. ;

Fields, B. D. ;

Foster, B. ;

Gaisser, T. K. ;

Garren, L. ;

Gerber, H. -J. ;

Gerbier, G. ;

Gherghetta, T. ;

Giudice, G. F. ;

Goodman, M. ;

Grab, C. ;

Gritsan, A. V. .

PHYSICS LETTERS B, 2008, 667 (1-5) :1-+

[2]

AZNAURYAN I, 2009, JLABPHY09993

[3] Goldstone theorem and diquark confinement beyond rainbow-ladder approximation [J].

Bender, A ;

Roberts, CD ;

vonSmekal, L .

PHYSICS LETTERS B, 1996, 380 (1-2) :7-12

[4]

Bhagwat MS, 2006, AIP CONF PROC, V842, P225

[5] Aspects and consequences of a dressed-quark-gluon vertex -: art. no. 035205 [J].

Bhagwat, MS ;

Höll, A ;

Krassnigg, A ;

Roberts, CD ;

Tandy, PC .

PHYSICAL REVIEW C, 2004, 70 (03) :0352051-03520515

[6] ELECTROMAGNETIC FORM-FACTORS IN THE NAMBU-JONA-LASINIO MODEL [J].

BLIN, AH ;

HILLER, B ;

SCHADEN, M .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1988, 331 (01) :75-82

[7] Unquenched quark propagator in Landau gauge [J].

Bowman, PO ;

Heller, UM ;

Leinweber, DB ;

Parappilly, MB ;

Williams, AG ;

Zhang, JB .

PHYSICAL REVIEW D, 2005, 71 (05) :1-7

[8] Unquenched gluon propagator in Landau gauge [J].

Bowman, PO ;

Heller, UM ;

Leinweber, DB ;

Parappilly, MB ;

Williams, AG .

PHYSICAL REVIEW D, 2004, 70 (03)

[9] Sketching the Bethe-Salpeter Kernel [J].

Chang, Lei ;

Roberts, Craig D. .

PHYSICAL REVIEW LETTERS, 2009, 103 (08)

[10] Extended NJL model for light and heavy mesons without q-(q)over-bar thresholds [J].

Ebert, D ;

Feldmann, T ;

Reinhardt, H .

PHYSICS LETTERS B, 1996, 388 (01) :154-160

← 1 2 3 →