Pion generalized parton distributions within a fully covariant constituent quark model

被引：26

作者：

Fanelli, Cristiano ^{[1
]}

Pace, Emanuele ^{[2
,3
]}

Romanelli, Giovanni ^{[4
]}

Salme, Giovanni ^{[5
]}

Salmistraro, Marco ^{[6
,7
]}

机构：

[1] MIT, Lab Nucl Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[2] Tor Vergata Univ, Phys Dept, Via Ric Sci 1, I-00133 Rome, Italy

[3] INFN Sez Tor Vergata, Via Ric Sci 1, I-00133 Rome, Italy

[4] Rutherford Appleton Lab, STFC, Harwell Campus, Didcot OX11 0QX, Oxon, England

[5] Ist Nazl Fis Nucl, Sez Roma, Ple A Moro 2, I-00185 Rome, Italy

[6] Univ Roma La Sapienza, Phys Dept, Ple A Moro 2, I-00185 Rome, Italy

[7] IIS G Sanctis, Via Cassia 931, I-00189 Rome, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 2016年 / 76卷 / 05期

关键词：

TRANSVERSE SPIN STRUCTURE; FRONT-FORM DYNAMICS; QUANTUM CHROMODYNAMICS; HADRON STRUCTURE; VALENCE REGION; LATTICE QCD; SCATTERING; EVOLUTION; SCHEME; ENERGY;

D O I：

10.1140/epjc/s10052-016-4101-1

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We extend the investigation of the generalized parton distribution for a charged pion within a fully covariant constituent quark model, in two respects: (1) calculating the tensor distribution and (2) adding the treatment of the evolution, needed for achieving a meaningful comparison with both the experimental parton distribution and the lattice evaluation of the so-called generalized form factors. Distinct features of our phenomenological covariant quarkmodel are: (1) a 4D Ansatz for the pion Bethe-Salpeter amplitude, to be used in the Mandelstam formula for matrix elements of the relevant current operators, and (2) only two parameters, namely a quark mass assumed to be m(q) = 220 MeV and a free parameter fixed through the value of the pion decay constant. The possibility of increasing the dynamical content of our covariant constituent quark model is briefly discussed in the context of the Nakanishi integral representation of the Bethe-Salpeter amplitude.

引用

页数：19

共 50 条

[41] Parton skewed distributions in the pion and quark-hadron duality
Bakulev, AP
Ruskov, R
Goeke, K
Stefanis, NG
PHYSICAL REVIEW D, 2000, 62 (05): : 1 - 11
[42] Nucleon generalized polarizabilities within a relativistic constituent quark model
Pasquini, B
Salme, G
PHYSICAL REVIEW C, 1998, 57 (05): : 2589 - 2596
[43] COVARIANT QUARK-MODEL OF PION STRUCTURE
ITO, H
BUCK, WW
GROSS, F
PHYSICS LETTERS B, 1990, 248 (1-2) : 28 - 33
[44] Pion valence-quark generalized parton distribution at physical pion mass
Lin, Huey-Wen
PHYSICS LETTERS B, 2023, 846
[45] OFF-SHELL GENERALIZED PARTON DISTRIBUTIONS OF THE PION
Broniowski, Wojciech
Shastry, Vanamali
Arriola, Enrique Ruiz
ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT, 2023, 16 (07)
[46] Generalized parton distributions for the pion in chiral perturbation theory
Diehl, M
Manashov, A
Schäfer, A
PHYSICS LETTERS B, 2005, 622 (1-2) : 69 - 82
[47] Chiral-odd generalized parton distributions and transversity in light-front constituent quark models
Pincetti, M.
Pasquini, B.
Boffi, S.
CZECHOSLOVAK JOURNAL OF PHYSICS, 2006, 56 : F229 - F236
[48] A model for the generalized parton distribution of the pion
Stassart, P
Bissey, F
Cudell, JR
Cugnon, J
Lansberg, JP
Quark Confinement and the Hadron Spectrum VI, 2005, 756 : 299 - 301
[49] Generalized Parton Distributions and Transverse Momentum Distribution of Pion
Kaur, Navdeep
Dahiya, Harleen
PROCEEDINGS OF THE 15TH INTERNATIONAL CONFERENCE ON MESON-NUCLEON PHYSICS AND THE STRUCTURE OF THE NUCLEON, 2020, 2249
[50] Pion generalized parton distributions: A path toward phenomenology
Morgado Chavez, Jose Manuel
Bertone, Valerio
De Soto Borrero, Feliciano
Defurne, Maxime
Mezrag, Cedric
Moutarde, Herve
Rodriguez-Quintero, Jose
Segovia, Jorge
PHYSICAL REVIEW D, 2022, 105 (09)

← 1 2 3 4 5 →