Transverse Λ polarization in e + e − processes within a TMD factorization approach and the polarizing fragmentation function

Autor: Umberto D’Alesio, Leonard Gamberg, Francesco Murgia, Marco Zaccheddu

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

General helicity formalism for two-hadron production in e + e − annihilation within a TMD approach

Autor: Umberto D’Alesio, Francesco Murgia, Marco Zaccheddu

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

Single-spin asymmetries in $$p^\uparrow p \rightarrow J/\psi +X$$ p↑p→J/ψ+X within a TMD approach: role of the color octet mechanism

Autor: Umberto D’Alesio, Francesco Murgia, Cristian Pisano, Sangem Rajesh

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

Role of the Soffer bound in determination of transversity and the tensor charge

Autor: Umberto D'Alesio, Carlo Flore, Alexei Prokudin

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

Reweighting the quark Sivers function with STAR jet data

Autor: Carlo Flore, Mariaelena Boglione, Umberto D'Alesio, Josè Osvaldo Gonzalez-Hernandez, Francesco Murgia, Alexey Prokudin

Publikováno v: 28th International Workshop on Deep Inelastic Scattering and Related Subjects
28th International Workshop on Deep Inelastic Scattering and Related Subjects, Apr 2021, Online conference, United States

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^\uparrow

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f1c935c050f539de878d71ef7ded0e3
https://doi.org/10.21468/scipostphysproc.8.034