Diffractive Dijet Production with a Leading Proton in ep Collisions at HERA

Schmitt, S.

doi:10.48550/arxiv.1502.01683

Cited by 5 publications

(7 citation statements)

References 39 publications

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“…We should mentioned here that the hard QCD factorization has been tested at HERA in various diffractive processes. In recent H1 analyses the validity of the hard factorization has been successfully examined for open charm production in photoproduction and DIS with D mesons [29,49] and in diffractive production of dijets in DIS [30,34,35,50]. These studies support the validity of QCD hard scattering factorization in diffractive DIS.…”

Section: A Cross Section For Diffractive Dismentioning

confidence: 69%

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First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework

2018

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We present GKG18-DPDFs, a next-to-leading order (NLO) QCD analysis of diffractive parton distribution functions (diffractive PDFs) and their uncertainties. This is the first global set of diffractive PDFs determined within the xFitter framework. This analysis is motivated by all available and most up-to-date data on inclusive diffractive deep inelastic scattering (diffractive DIS). Heavy quark contributions are considered within the framework of the Thorne-Roberts (TR) general mass variable flavor number scheme (GM-VFNS). We form a mutually consistent set of diffractive PDFs due to the inclusion of high-precision data from H1/ZEUS combined inclusive diffractive cross sections measurements. We study the impact of the H1/ZEUS combined data by producing a variety of determinations based on reduced data sets. We find that these data sets have a significant impact on the diffractive PDFs with some substantial reductions in uncertainties. The predictions based on the extracted diffractive PDFs are compared to the analyzed diffractive DIS data and with other determinations of the diffractive PDFs.

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Section: A Cross Section For Diffractive Dismentioning

confidence: 69%

“…Like the total DIS cross section, the diffractive DIS cross section is directly sensitive to the diffractive quark density, whilst the gluon density is only indirectly constrained through scaling violations. Since the gluons directly contribute to the jet production through the boson-gluon fusion process[34,35,49,50,74], one can use the…”

mentioning

confidence: 99%

First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework

2018

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“…The migration matrix of the inclusive jet measurement contained side-bins 3 < P jet T < 5 GeV and 5 < P jet T < 7 GeV of the extended phase space. With the improved understanding of the low-P jet T region as already used in earlier works [66,67], the measurement phase space could be slightly extended, and cross section measurements for 5 < P jet T < 7 GeV as a function of Q 2 are provided.…”

Section: Phase Space Extension At High Qmentioning

confidence: 99%

Measurement of Jet Production Cross Sections in Deep-inelastic ep Scattering at HERA

2016

Preprint

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A precision measurement of jet cross sections in neutral current deep-inelastic scattering for photon virtualities 5.5 < Q 2 < 80 GeV 2 and inelasticities 0.2 < y < 0.6 is presented, using data taken with the H1 detector at HERA, corresponding to an integrated luminosity of 290 pb −1 . Double-differential inclusive jet, dijet and trijet cross sections are measured simultaneously and are presented as a function of jet transverse momentum observables and as a function of Q 2 . Jet cross sections normalised to the inclusive neutral current DIS cross section in the respective Q 2 -interval are also determined. Previous results of inclusive jet cross sections in the range 150 < Q 2 < 15 000 GeV 2 are extended to low transverse jet momenta 5 < P jet T < 7 GeV. The data are compared to predictions from perturbative QCD in next-to-leading order in the strong coupling, in approximate next-to-next-to-leading order and in full next-to-next-to-leading order. Using also the recently published H1 jet data at high values of Q 2 , the strong coupling constant α s (M Z ) is determined in next-to-leading order.

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“…Our analysis can be extended in various different directions. First, our analysis can be extended to the diffractive dijet events at HERA [62,63]. For the future, our main goal is to assess the impact of diffractive dijet productions data on the diffractive PDFs and their uncertainties.…”

Section: Discussionmentioning

confidence: 99%

“…Clearly, there are other source of important processes that will provide additional information on the diffractive PDFs in the LHC era. Among these, one could consider diffractive dijet productions [57][58][59][60][61][62][63], providing useful information on the diffractive gluon density and, possibly, on the quark flavor separation respectively. As we discussed in Introduction, the future high energy and high luminosity machines such as LHeC and FFC-eh will measure the diffractive DIS cross sections with the highest possible precision leading to the much better constrains for the diffractive PDFs [10].…”

Section: Diffractive Dis Data Setsmentioning

confidence: 99%

Phenomenology of diffractive DIS in the framework of fracture functions and determination of diffractive parton distribution functions

Khanpour

2019

Phys. Rev. D

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The goal of this study is to determine a set of diffractive parton distribution function (diffractive PDFs) from a QCD analysis of all available and up-to-date diffractive deep inelastic scattering (diffractive DIS) data sets from HERA ep collider, including the most recent H1 and ZUES combined inclusive diffractive cross section measurements. This extraction of diffractive PDFs, referred to as HK19-DPDF, is performed at next-to-leading (NLO) and next-to-next-to-leading (NNLO) in perturbative QCD. This new determination of diffractive PDFs is based on the fracture functions methodology, a QCD framework designed to provide a statistically sound representation of diffractive DIS processes. Heavy quark contributions to the diffractive DIS are considered within the framework of the FONLL general mass variable flavor number scheme (GM-VFNS) and the "Hessian approach" is used to determine the uncertainties of diffractive PDFs. We discuss the novel aspects of the approach used in the present analysis, namely an optimized and flexible parametrization of the diffractive PDFs as well as a strategy based on the fully factorization theorem for diffractive hard processes. We then present the diffractive PDFs, and discuss the fit quality and the stability upon variations of the kinematic cuts and the fitted data sets. We find that the systematic inclusion of higher-order QCD corrections could improves the description of the data. We compare the extracted sets of diffractive PDFs based on the fracture functions approach to other recent sets of diffractive PDFs, finding in general very good agreements.

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Diffractive Dijet Production with a Leading Proton in ep Collisions at HERA

Cited by 5 publications

References 39 publications

First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework

First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework

Measurement of Jet Production Cross Sections in Deep-inelastic ep Scattering at HERA

Phenomenology of diffractive DIS in the framework of fracture functions and determination of diffractive parton distribution functions

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