HERAFitter - an open source QCD fit framework

Sapronov, A.; team, HERAFitter

doi:10.1088/1742-6596/608/1/012051

Cited by 8 publications

(7 citation statements)

References 35 publications

(14 reference statements)

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“…This article has been developed based on xFitter [42] as an open source QCD framework, which is the newly updated version of the former HERAFitter package [43].…”

Section: Cross Sections and Parton Distributionsmentioning

confidence: 99%

Impact of beauty and charm H1-ZEUS combined measurements on PDFs and determination of the strong coupling

Vafaee

Khorramian

2017

Eur. Phys. J. A

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In this QCD analysis, we investigate the impact of recent measurements of heavy-flavor charm and beauty cross sections data sets on the simultaneous determination of Parton Distribution Functions (PDFs) and the strong coupling, α s (M 2 Z ). We perform three different fits based on Variable-Flavour Number Scheme (VFNS) at the Leading Order (LO) and Next-to-Leading Order (NLO) and choose the full HERA run I and II combined data as a new measurement of inclusive Deep Inelastic Scattering (DIS) cross sections for our base data set. We show that including charm and beauty cross sections data reduces the uncertainty of gluon distribution and improves the fit quality up to 4.1% from leading order to next-to-leading order and up to 1.7% for only NLO without and with beauty and charm data contributions.

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“…This article has been developed based on xFitter [42] as an open source QCD framework, which is the newly updated version of the former HERAFitter package [43].…”

Section: Cross Sections and Parton Distributionsmentioning

confidence: 99%

Impact of beauty and charm H1-ZEUS combined measurements on PDFs and determination of the strong coupling

Vafaee

Khorramian

2017

Eur. Phys. J. A

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“…In this article, we perform our QCD analysis using the xFitter open source framework [59,60], which previously was known as HERAfitter [93]. Very recent analyses using xFitter package are reported in Refs.…”

Section: Pdf Parametrizationmentioning

confidence: 99%

Parton distribution functions and constraints on the intrinsic charm content of the proton using the Brodsky-Hoyer-Peterson-Saka approach

Abdolmaleki

Khorramian

2019

Phys. Rev. D

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In this work, a new set of parton distribution functions taking into account the intrinsic charm (IC) contribution is presented. We focus on the impact of the EMC measurements on the large x charm structure function as the strongest evidence for the intrinsic charm when combined with the HERA, SLAC and BCDMS data. The main goal of this paper is the simultaneous determination of the intrinsic charm probability P cc/p and strong coupling αs. This allows us to study the interaction of these two quantities as well as the influence on the PDFs in the presence of IC contributions. By considering αs which can be fix or free parameter from our QCD analysis, we find that although there is not a significant change in the extracted central value of PDFs and their uncertainties, the obtained value of P cc/p change by factor 7.8%. The extracted value of P cc/p in the present QCD analysis is consistent with the recent reported upper limit of 1.93%, which is obtained for the first time from LHC measurements. We show the intrinsic charm probability is sensitive to the strong coupling constant and also the charm mass. The extracted value of the strong coupling constant αs(M 2 Z ) = 0.1191 ± 0.0008 at NLO is in good agreement with world average value and available theoretical models.

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“…• To fitting with experimental data, we us the xFitter package as a powerful QCD open source framework [81][82][83][84][85][86][87][88][89].…”

Section: Qcd Analysis Set-up and Systematic Uncertaintiesmentioning

confidence: 99%

NNLO compatibility between pQCD theory and phenomenology in determination of the $b$-quark pole and \MSbar running masses

Vafaee,

Javidan,

Shokouhi

2019

Preprint

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Measurements of open b-quark production in deep inelastic scattering (DIS) of e ± p at HERA provide an important test of pQCD theory within the Standard Model and is used to constrain the proton PDFs. In this contribution, we attempt to determine the b-quark pole mass M b and MS running mass m b , using phenomenology of H1, ZEUS and (H1 + ZEUS) F bb 2 beauty vertex production data sets and pQCD theory. Then we discuss about the compatibility between pQCD

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HERAFitter - an open source QCD fit framework

Cited by 8 publications

References 35 publications

Impact of beauty and charm H1-ZEUS combined measurements on PDFs and determination of the strong coupling

Impact of beauty and charm H1-ZEUS combined measurements on PDFs and determination of the strong coupling

Parton distribution functions and constraints on the intrinsic charm content of the proton using the Brodsky-Hoyer-Peterson-Saka approach

NNLO compatibility between pQCD theory and phenomenology in determination of the $b$-quark pole and \MSbar running masses

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