Hadron structure at small-x via unintegrated gluon densities

Hadron structure at small-x via unintegrated gluon densities Full article

Journal

Suplemento de la Revista Mexicana de Fisica
ISSN: 2683-2585

Output data

Year: 2022, Volume: 3, Number: 3, Pages: 1-5 Pages count : 5 DOI: 10.31349/suplrevmexfis.3.0308109

Tags

Hadron structure; Quantum Chromodynamics at smallx.

Authors

Dafne Bolognino A. ¹ , Giovanni Celiberto F. ^2,3,4 , Fucilla Michael ¹ , Yu. Ivanov D. ⁵ , Papa A. ¹ , Shäfer W. ⁶ , Szczurek A. ^6,7

Affiliations

1	Dipartimento di Fisica, Universit`a della Calabria and Istituto Nazionale di Fisica Nucleare,Gruppo collegato di Cosenza, I-87036 Arcavacata di Rende, Cosenza, Italy
2	European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*),I-38123 Villazzano, Trento, Italy ,
3	Fondazione Bruno Kessler (FBK), I-38123 Povo, Trento, Italy
4	INFN-TIFPA Trento Institute of Fundamental Physics and Applications,I-38123 Povo, Trento, Italy
5	Sobolev Institute of Mathematics, 630090 Novosibirsk, Russia
6	Institute of Nuclear Physics Polish Academy of Sciencesul. Radzikowskiego 152, PL-32-342, Krak ́ow, Poland
7	College of Natural Sciences, Institute of Physics, University of Rzesz ́ow,ul. Pigonia 1, PL-35-310 Rzesz ́ow, Poland

Inclusive as well as exclusive emissions in forward and central directions of rapidity are widely recognized as excellent channels to access the proton structure at small x. In this regime, to describe nucleons structure, it is necessary to usekT-unintegrated distributions. In particular, at large transverse momenta, thex-evolution of the so-called unintegrated gluon distribution is driven by the Balitsky-Fadin-Kuraev-Lipatov (BFKL) equation, within the framework of the high-energy factorization (HEF).Recent analyses on the diffractive electroproduction ofρmesons have corroborated the underlying assumption that the small-size dipole scattering mechanism is at work, thus validating the use of the HEF formalism. Nonetheless, a significant sensitivity of polarized cross sections to intermediate values of the meson transverse momenta, where, in the case of inclusive emissions, a description at the hand of the transverse momentum dependent (TMD) factorization starts to be the most appropriate framework, has been observed. In this work, we will review the formal description of the unintegrated gluon density UGD within the BFKL approach and present some UGD models that have been proposed, then we will describe the state of the art of some recent phenomenological analyses.

Dafne Bolognino A. , Giovanni Celiberto F. , Fucilla M. , Yu. Ivanov D. , Papa A. , Shäfer W. , Szczurek A.
Hadron structure at small-x via unintegrated gluon densities
Suplemento de la Revista Mexicana de Fisica. 2022. V.3. N3. P.1-5. DOI: 10.31349/suplrevmexfis.3.0308109 РИНЦ OpenAlex

Submitted:	Jan 16, 2022
Accepted:	Feb 24, 2022

Elibrary:	58579087
OpenAlex:	W4281934290

DB	Citing
OpenAlex	13
Elibrary	4