Determination of the strong coupling constant alpha(s)(&ITm&ITZ) in next-to-next-to-leading order QCD using HI jet cross section measurements

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10368786" target="_blank" >RIV/00216208:11320/17:10368786 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1140/epjc/s10052-017-5314-7" target="_blank" >http://dx.doi.org/10.1140/epjc/s10052-017-5314-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1140/epjc/s10052-017-5314-7" target="_blank" >10.1140/epjc/s10052-017-5314-7</a>

Result language

angličtina

Original language name

Determination of the strong coupling constant alpha(s)(&ITm&ITZ) in next-to-next-to-leading order QCD using HI jet cross section measurements

Original language description

The strong coupling constant αs is determined from inclusive jet and dijet cross sections in neutral-current deep-inelastic ep scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) QCD predictions. The dependence of the NNLO predictions and of the resulting value of αs(mZ) at the Zboson mass mZ are studied as a function of the choice of the renormalisation and factorisation scales. Using inclusive jet and dijet data together, the strong coupling constant is determined to be αs(mZ) = 0.1157 (20)exp (29)th. Complementary, αs(mZ) is determined together with parton distribution functions of the proton (PDFs) from jet and inclusive DIS data measured by the H1 experiment. The value αs(mZ) = 0.1142 (28)tot obtained is consistent with the determination from jet data alone. The impact of the jet data on the PDFs is studied. The running of the strong coupling is tested at different values of the renormalisation scale and the results are found to be in agreement with expectations.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

<a href="/en/project/LG14033" target="_blank" >LG14033: Czech collaboration on the projects H1 and CALICE</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

European Physical Journal C

ISSN

1434-6044

e-ISSN

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Volume of the periodical

77

Issue of the periodical within the volume

11

Country of publishing house

DE - GERMANY

Number of pages

21

Pages from-to

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UT code for WoS article

000416366800001

EID of the result in the Scopus database

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