Flavour separation of helicity distributions from deep inelastic muon-deuteron scattering

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F09%3A00206348" target="_blank" >RIV/00216208:11320/09:00206348 - isvavai.cz</a>

Alternative codes found

RIV/68081731:_____/09:00330551 RIV/68407700:21340/09:00158857 RIV/46747885:24510/09:#0000255 RIV/46747885:24510/09:#0000145 RIV/46747885:24220/09:#0002495

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Flavour separation of helicity distributions from deep inelastic muon-deuteron scattering

Original language description

We present a LO evaluation of helicity densities of valence, Delta u(v) Delta d(v), non-strange sea, Delta(u) over bar Delta(d) over bar, and strange quarks, Delta s (assumed to be equal to Delta(s) over bar). They have been obtained from the inclusive asymmetry A(1,d) and the semi-inclusive asymmetries A(1,d)(pi ), A(1,d)(pi-), A(1,d)(K ), A(1,d)(K-) measured in polarised deep inelastic muon-deuteron scattering. The full deuteron statistics of COMPASS (years 2002-2004 and 2006) has been used. The datacover the range Q(2) } 1 (GeV/c)(2) and 0.004 { x { 0.3. Both non-strange densities are found to be in a good agreement with previous measurements. The distribution of Delta s(x) is compatible with zero in the whole measured range, in contrast to the shape of the strange quark helicity distribution obtained in most LO and NLO QCD fits. The sensitivity of the values of Delta s(x) upon the choice of fragmentation functions used in the derivation is discussed.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BF - Elementary particle theory and high energy physics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2009

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physics Letters. B

ISSN

0370-2693

e-ISSN

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Volume of the periodical

680

Issue of the periodical within the volume

3

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

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UT code for WoS article

000270618200004

EID of the result in the Scopus database

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