Zobrazeno 1 - 10
of 147
pro vyhledávání: '"Umberto D'Alesio"'
Publikováno v:
Physics Letters B, Vol 851, Iss , Pp 138552- (2024)
In this Letter, we investigate the spontaneous transverse polarization of Λ hyperons produced in unpolarized pp collisions inside a jet, by adopting a TMD approach where transverse momentum effects are included only in the fragmentation process. We
Externí odkaz:
https://doaj.org/article/65bb161edccb4597a8dfe772f3afc948
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 12, Pp 1-45 (2022)
Abstract We perform a re-analysis of Belle data for the transverse Λ and Λ ¯ $$ \overline{\Lambda} $$ polarization in e + e − annihilation processes within a transverse momentum dependent (TMD) factorization approach. We consider two data sets,
Externí odkaz:
https://doaj.org/article/218683abfc554fc6aa0d094a46aba76a
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 3, Pp 1-32 (2022)
Abstract We study the polar and azimuthal decay angular distributions of J/ψ mesons produced in semi-inclusive, deep-inelastic electron-proton scattering. For the description of the quarkonium formation mechanism, we adopt the framework of nonrelati
Externí odkaz:
https://doaj.org/article/c042557f663b4713ada4a198e5a6feb7
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 10, Pp 1-44 (2021)
Abstract We present the complete leading-order results for the azimuthal dependences and polarization observables in e + e − → h 1 h 2 + X processes, where the two hadrons are produced almost back-to-back, within a transverse momentum dependent (
Externí odkaz:
https://doaj.org/article/b8c3b290ac474d6aa0655af26afe3124
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-26 (2020)
Abstract We consider the transverse momentum spectrum and the cos 2ϕ azimuthal distribution of J/ψ mesons produced in semi-inclusive, deep-inelastic electron-proton scattering, where the electron and the proton are unpolarized. At low transverse mo
Externí odkaz:
https://doaj.org/article/ee3ad70f67e147a690e2a67f59a32b77
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 12, Pp 1-10 (2019)
Abstract We calculate the transverse single-spin asymmetry (SSA) for $$J/\psi $$ J/ψ production in proton-proton collisions, within non-relativistic QCD, employing the transverse momentum dependent, generalized parton model, which includes both spin
Externí odkaz:
https://doaj.org/article/a7f2e03332174d3d959a8d408252d70a
Publikováno v:
SciPost Physics Proceedings, Iss 8, p 034 (2022)
The Bayesian reweighting procedure is applied for the first time to a TMD distribution, the quark Sivers function extracted from SIDIS data. By exploiting the recent published single spin asymmetry data for the inclusive jet production in $p^\upar
Externí odkaz:
https://doaj.org/article/8ef2491104ea4ea88a7d8e23ccd9765c
Publikováno v:
SciPost Physics Proceedings, Iss 8, p 131 (2022)
Experimental data from Belle Collaboration for the transverse polarization of $\Lambda$'s measured in $e^+ e^-$ annihilation processes are used to extract the polarizing fragmentation function (FF) within a TMD approach. We consider both associated
Externí odkaz:
https://doaj.org/article/31627c1950114a8d8e578581d5cdb1a3
Publikováno v:
SciPost Physics Proceedings, Iss 8, p 017 (2022)
We study the Sivers asymmetry in inelastic $J/\psi$ leptoproduction, $ep^\uparrow \to e+ J/\psi+X$, within a transverse momentum dependent scheme, the so-called generalized parton model (GPM). The effects of final-state interactions are properly t
Externí odkaz:
https://doaj.org/article/b3c48b78341f4729b6053e008b2119f7
Publikováno v:
Physics Letters B, Vol 803, Iss , Pp - (2020)
The transversity and the tensor charge of the nucleon, currently under active investigation experimentally and theoretically, are fundamental quantities in hadron physics as well as for our comprehension of the nucleon structure. Some tension between
Externí odkaz:
https://doaj.org/article/7cf79143104a46be9feca26bd8f6f1ab