Charm-Quark Production in Deep-Inelastic Neutrino Scattering at Next-to-Next-to-Leading Order in QCD

Berger, Edmond L.; Gao, Jun; Li, Chong Sheng; Liu, Ze Long; Zhu, Hua Xing

doi:10.1103/physrevlett.116.212002

Cited by 56 publications

(62 citation statements)

References 53 publications

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“…Next-to-leading order (NLO) is used only for inclusive jet data from the Tevatron and the LHC and for deepinelastic scattering (DIS) charged-current data from HERA and fixed-target experiments. The NNLO predictions for these processes [18][19][20] were not available or incomplete at the time of the CT14 study, and we have argued [1,21] that the effect of missing NNLO terms in jet production on the PDFs is small relatively to the experimental uncertainties in the CT14 data sets. Similarly, the NNLO contribution for charged-current DIS, including massive charm scattering contributions, is modest compared to the experimental uncertainties.…”

Section: Jhep02(2018)059mentioning

confidence: 94%

“…Besides the LHC electroweak boson production cross sections, we examined the implications of the IC for associate production of Z boson and charm-jet at the LHC, and summarized our findings in table 2 and figures [16][17][18][19]. A fixed-order calculation for Z + c production, MCFM at NLO, was compared to a merged parton showering calculation in Sherpa, which also generates charm jets in the final state via gluon splittings.…”

Section: Jhep02(2018)059mentioning

confidence: 99%

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CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis

Hou

Dulat

Gao

et al. 2018

J. High Energ. Phys.

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Abstract:We investigate the possibility of a (sizable) nonperturbative contribution to the charm parton distribution function (PDF) in a nucleon, theoretical issues arising in its interpretation, and its potential impact on LHC scattering processes. The "fitted charm" PDF obtained in various QCD analyses contains a process-dependent component that is partly traced to power-suppressed radiative contributions in DIS and is generally different at the LHC. We discuss separation of the universal component of the nonperturbative charm from the rest of the radiative contributions and estimate its magnitude in the CT14 global QCD analysis at the next-to-next-to leading order in the QCD coupling strength, including the latest experimental data from HERA and the Large Hadron Collider. Models for the nonperturbative charm PDF are examined as a function of the charm quark mass and other parameters. The prospects for testing these models in the associated production of a Z boson and a charm jet at the LHC are studied under realistic assumptions, including effects of the final-state parton showering.

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Section: Jhep02(2018)059mentioning

confidence: 94%

Section: Jhep02(2018)059mentioning

confidence: 99%

CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis

Hou

Dulat

Gao

et al. 2018

J. High Energ. Phys.

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“…6 In a recent publication [40] the O(α 2 s ) corrections (NNLO) to charm production in CC DIS were presented. However, no analytical expression was provided.…”

Section: )mentioning

confidence: 99%

A determination of m c (m c ) from HERA data using a matched heavy-flavor scheme

Bertone¹,

Camarda

Cooper-Sarkar³

et al. 2016

J. High Energ. Phys.

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Abstract:The charm quark mass is one of the fundamental parameters of the Standard Model Lagrangian. In this work we present a determination of the MS charm mass from a fit to the inclusive and charm HERA deep-inelastic structure function data. The analysis is performed within the xFitter framework, with structure functions computed in the FONLL general-mass scheme as implemented in APFEL. In the case of the FONLL-C scheme, we obtain m c (m c ) = 1.335 ± 0.043(exp)

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“…A similar calculation was performed for charm quark production in neutrino deep inelastic scattering (DIS) in Ref. [36]. For the corrections to the light-quark line, we adopted the method of "projection-to-Born" in Ref.…”

mentioning

confidence: 99%

NNLO QCD corrections tot-channel single top quark production and decay

et al. 2016

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We present a fully differential next-to-next-to-leading order calculation of t-channel single top-quark production and decay at the LHC under narrow-width approximation and neglecting cross-talk between incoming protons. We focus on the fiducial cross sections at 13 TeV, finding that the next-to-next-to-leading order QCD corrections can reach the level of −6%. The scale variations are reduced to the level of a percent. Our results can be used to improve experimental acceptance estimates and the measurements of the single top-quark production cross section and the top-quark electroweak couplings.Introduction. The top quark can be produced singly at a hadron collider through the electroweak (EW) W tb vertex. There are three production channels: the t-channel and s-channel processes through exchange of a W boson, and associated production of tW . All three channels are sensitive to the structure of the W tb vertex and to the CKM matrix element V tb , an important motivation for their study. Moreover, single top production provides an important window to physics beyond the standard model (SM) [1], e.g., a modified W tb vertex, new heavy quarks, new gauge bosons, flavor-changing neutral current, and so forth. Single top-quark production was first established at the Fermilab Tevatron [2,3], and later at the Large Hadron Collider (LHC) [4][5][6][7]. Single top-quark studies are expected to enter an era of high precision during the upcoming run of the LHC at higher energy and larger luminosity.The t-channel production has the largest rate among the three at the LHC, about 210 pb at √ s = 13 TeV. Significant efforts to improve the theoretical description of this process include next-to-leading order (NLO) QCD corrections in both 4-and 5-flavor schemes in Refs. [8][9][10][11][12][13][14][15][16]. Soft gluon resummation has been considered in Refs. [17][18][19][20]. Matching NLO calculations to parton showers is done in Refs. [21][22][23]. Recently, next-to-nextto-leading order (NNLO) QCD corrections with a stable top quark were calculated in Ref. [24], neglecting certain subleading contributions in color.In this manuscript we present the first fully differential NNLO calculation of t-channel single top quark production and decay at the LHC in the 5-flavor scheme in QCD. We follow Ref. [24] in neglecting cross-talk between the hadronic systems of the two incoming protons. To the best of our knowledge, our calculation is the first to combine QCD corrections at NNLO for production and decay, meaning that a realistic simulation at NNLO is now

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Charm-Quark Production in Deep-Inelastic Neutrino Scattering at Next-to-Next-to-Leading Order in QCD

Cited by 56 publications

References 53 publications

CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis

CT14 intrinsic charm parton distribution functions from CTEQ-TEA global analysis

A determination of m c (m c ) from HERA data using a matched heavy-flavor scheme

NNLO QCD corrections tot-channel single top quark production and decay

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