Record ID

UAMaa099b04f6e640218e83d0292fa7a264

Author

Shohini Bhattacharya Shohini Bhattacharya,, Undefined Affiliation

Krzysztof Michał Cichy Krzysztof Michał Cichy,, Department of Physics of Functional Materials [nowa struktura organizacyjna] (SNŚ/WyF/JBWF)Szkoła Nauk Ścisłych [nowa struktura organizacyjna] (SNŚ)

Martha Constantinou Martha Constantinou,, Undefined Affiliation

Andreas Metz Andreas Metz,, Undefined Affiliation

Aurora Scapellato Aurora Scapellato,, Undefined Affiliation

Fernanda Steffens Fernanda Steffens,, Undefined Affiliation

Journal series

Physical Review D, ISSN 2470-0010, e-ISSN 2470-0029, [1538-4500, 1550-7998]

Issue year

2021

Vol

104

No

11

Article number

114510

Keywords in original language

Lattice QCD ; Lattice field theory ; Lattice gauge theory

ASJC Classification

3101 Physics and Astronomy (miscellaneous)

Abstract in original language

We report the first-ever calculation of the isovector flavor combination of the chiral-odd twist-3 parton distribution hL(x) for the proton from lattice QCD. We employ gauge configurations with two degenerate light, a strange and a charm quark (Nf=2+1+1) of maximally twisted mass fermions with a clover improvement. The lattice has a spatial extent of 3 fm and lattice spacing of 0.093 fm. The values of the quark masses lead to a pion mass of 260 MeV. We use a source-sink time separation of 1.12 fm to control contamination from excited states. Our calculation is based on the quasi-distribution approach, with three values for the proton momentum: 0.83, 1.25, and 1.67 GeV. The lattice data are renormalized nonperturbatively using the RI′ scheme, and the final result for hL(x) is presented in the ¯¯¯¯¯¯MS scheme at the scale of 2 GeV. Furthermore, we compute in the same setup the transversity distribution, h1(x), which allows us, in particular, to compare hL(x) to its Wandzura-Wilczek approximation. We also combine results for the isovector and isoscalar flavor combinations to disentangle the individual quark contributions for h1(x) and hL(x), and address the Wandzura-Wilczek approximation in that case as well.

DOI

DOI:10.1103/physrevd.104.114510 Opening in a new tab

Language

eng (en) English

Score (nominal)

140

Score source

journalList

Score

Ministerial score = 140.0, 28-01-2022, ArticleFromJournal

Publication indicators

Scopus SNIP: 2017 = 1.058; WoS Impact Factor: 2019 (2 years) = 4.833 - 2019 (5 years) =4.012

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