Pion transverse charge density from e+e- annihilation data and logarithmic dispersion relations

被引：0

作者：

Arriola, Enrique Ruiz ^{[1
,2
]}

Sanchez-Puertas, Pablo ^{[1
]}

Weiss, Christian ^{[3
]}

机构：

[1] Univ Granada, Dept Fis Atom Mol & Nucl, E-18071 Granada, Spain

[2] Univ Granada, Inst Carlos I Fis Teor & Computac, E-18071 Granada, Spain

[3] Jefferson Lab, Theory Ctr, Newport News, VA 23606 USA

来源：

PHYSICS LETTERS B | 2025年 / 866卷

关键词：

Pion form factor; Dispersion relations; Annihilation experiments; Quantum chromodynamics; GENERALIZED PARTON DISTRIBUTIONS; FORM-FACTORS; ASYMPTOTIC-BEHAVIOR; EXCLUSIVE PROCESSES;

D O I：

10.1016/j.physletb.2025.139585

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The transverse charge density of the pion is extracted from a dispersive analysis of the e+e- -> pi+ pi- exclusive annihilation data. A logarithmic dispersion relation is used to compute the unknown phase of the timelike pion form factor from the modulus obtained from the annihilation cross section. The method is model-independent and permits quantitative uncertainty estimates. The density is obtained with few-percent accuracy down to b similar to 0.1 fm; at smaller distances it depends qualitatively on the assumed high-energy behavior of the timelike form factor. Implications for pion structure and the relevance of pQCD asymptotics are discussed.

引用

页数：7

共 48 条

[1] Transverse charge and current densities in the nucleon from dispersively improved chiral effective field theory [J].

Alarcon, J. M. ;

Weiss, C. .

PHYSICAL REVIEW D, 2022, 106 (05)

[2] Spacelike pion form factor from analytic continuation and the onset of perturbative QCD [J].

Ananthanarayan, B. ;

Caprini, Irinel ;

Imsong, I. Sentitemsu .

PHYSICAL REVIEW D, 2012, 85 (09)

[3]

Arriola E. Ruiz, 2024, 10 INT C QUARKS NUCL

[4] Phase of the electromagnetic form factor of the pion [J].

Arriola, Enrique Ruiz ;

Sanchez-Puertas, Pablo .

PHYSICAL REVIEW D, 2024, 110 (05)

[5] Pion electromagnetic form factor, perturbative QCD, and large-Nc Regge models [J].

Arriola, Enrique Ruiz ;

Broniowski, Wojciech .

PHYSICAL REVIEW D, 2008, 78 (03)

[6] Precise Measurement of the e+e-→π+π-(γ) Cross Section with the Initial State Radiation Method at BABAR [J].

Aubert, B. ;

Karyotakis, Y. ;

Lees, J. P. ;

Poireau, V. ;

Prencipe, E. ;

Prudent, X. ;

Tisserand, V. ;

Garra Tico, J. ;

Grauges, E. ;

Martinelli, M. ;

Palano, A. ;

Pappagallo, M. ;

Eigen, G. ;

Stugu, B. ;

Sun, L. ;

Battaglia, M. ;

Brown, D. N. ;

Hooberman, B. ;

Kerth, L. T. ;

Kolomensky, Yu. G. ;

Lynch, G. ;

Osipenkov, I. L. ;

Tackmann, K. ;

Tanabe, T. ;

Hawkes, C. M. ;

Soni, N. ;

Watson, A. T. ;

Koch, H. ;

Schroeder, T. ;

Asgeirsson, D. J. ;

Hearty, C. ;

Mattison, T. S. ;

McKenna, J. A. ;

Barrett, M. ;

Khan, A. ;

Randle-Conde, A. ;

Blinov, V. E. ;

Bukin, A. D. ;

Buzykaev, A. R. ;

Druzhinin, V. P. ;

Golubev, V. B. ;

Onuchin, A. P. ;

Serednyakov, S. I. ;

Skovpen, Yu. I. ;

Solodov, E. P. ;

Todyshev, K. Yu. ;

Bondioli, M. ;

Curry, S. ;

Eschrich, I. ;

Kirkby, D. .

PHYSICAL REVIEW LETTERS, 2009, 103 (23)

[7] Unraveling hadron structure with generalized parton distributions [J].

Belitsky, AV ;

Radyushkin, AV .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2005, 418 (1-6) :1-387

[8] Generalized parton distributions and the structure of the nucleon [J].

Boffi, S. ;

Pasquini, B. .

RIVISTA DEL NUOVO CIMENTO, 2007, 30 (09) :387-448

[9]

Broniowski W, 2025, Arxiv, DOI arXiv:2412.00848

[10] Modeling the pion and kaon form factors in the timelike region [J].

Bruch, C ;

Khodjamirian, A ;

Kühn, JH .

EUROPEAN PHYSICAL JOURNAL C, 2005, 39 (01) :41-54

← 1 2 3 4 5 →