Resolved 
                $\gamma^*_L$
               in hard collisions of virtual photons: QCD effects

Chýla, Jiřı́; Taševský, M.

doi:10.1007/s100520100560

Cited by 7 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(When Q 2 = 0, the contribution from the longitudinally polarized virtual photon should be added to Eq (4); see also Refs. [31,32].) Note in our case one should ensure exclusivity of the process such that the proton and nucleus remain intact.…”

Section: Exclusive Diffractive Dijet Production In Pa Upcsmentioning

confidence: 99%

Accessing the gluon Wigner distribution in ultraperipheral pA collisions

et al. 2017

View full text Add to dashboard Cite

We propose to constrain the gluon Wigner distribution in the nucleon by studying the exclusive diffractive dijet production process in ultraperipheral proton-nucleus collisions (UPCs) at RHIC and the LHC. Compared to the previous proposal in Ref. [Y. Hatta, B. W. Xiao, and F. Yuan, Phys. Rev. Lett. 116, 202301 (2016).] to study the same observable in lepton-nucleon scattering, the use of UPCs has a few advantages: not only is the cross section larger, but the extraction of the Wigner distribution from the data also becomes simpler, including its elliptic angular dependence. We compute the corresponding cross section and evaluate the coefficients using models which include the gluon saturation effects. A potential for the measurements of the Wigner distribution at current and future experimental facilities is also discussed.

show abstract

Section: Exclusive Diffractive Dijet Production In Pa Upcsmentioning

confidence: 99%

Accessing the gluon Wigner distribution in ultraperipheral pA collisions

et al. 2017

View full text Add to dashboard Cite

show abstract

“…However when E 2 ⊥4 ≫ Q 2 it becomes important to calculate these corrections and to replace (11) by the LO or NLO expressions of the quark distribution [10,19,20,21].…”

Section: The Resolved Contributionmentioning

confidence: 99%

An NLO calculation of the electroproduction of large-E $_{\bot}$ hadrons

et al. 2004

View full text Add to dashboard Cite

We present a Next-to-Leading Order calculation of the cross section for the leptoproduction of large-E ⊥ hadrons and we compare our predictions with H1 data on the forward production of π 0 . We find large higher order corrections and an important sensitivity to the renormalization and factorization scales. These large corrections are shown to arise in part from BFKL-like diagrams at the lowest order.

show abstract

“…The incorporation of some kind of QCD parton shower mechanism, which is not yet part of the NLO calculations, would presumably further improve the agreement with the data -similarly as it does in the case of LO MC generators (as will be demonstrated in Section 6.2, Figs.. 6.9 and 6.10). Also the NLO resolved γ * L contribution, which is not yet implemented within the standard JETVIP code, is expected to improve the description of data [CT00b,CT01].…”

Section: Resolved Virtual Photons In Nlo Calculationsmentioning

confidence: 99%

“…Also in the few instances where the effects of longitudinal photon have been measured in the intermediate Q 2 region, their contribution was found to be quite significant [HER00a,H197a,HER00b]. Some of these contributions can be given a partonic interpretation, and the parton distribution functions (PDFs) can be introduced in the very same way as is often done for transversely polarised resolved photons [SS96,CT01,Chy00a,Chy00b].…”

Section: Introductionmentioning

confidence: 99%

Measurement of dijet production at low Q 2 at HERA

2004

Eur. Phys. J. C

View full text Add to dashboard Cite

The measurement of triple differential dijet cross sections in e ± p interactions in the H1 experiment in the region of photon virtualities 2 < Q 2 < 80 GeV 2 , inelasticities 0.1 < y < 0.85, jet transverse energies E * T 1 > 7 GeV, E * T 2 > 5 GeV, and pseudorapidities −2.5 < η * 1 , η * 2 < 0 is presented. The analysis was done in the γ * p centre-of-mass frame using an integrated luminosity of 57.6 pb −1. The data are compared with Monte Carlo event generators based on LO QCD cross sections and NLO QCD parton level calculations. The latter fail to describe the region of low Q 2 and low jet transverse energies, in contrast to the LO Monte Carlo generators that include direct and resolved photon interactions. The effects of resolved photons with longitudinal polarisation and initial and final state parton showers are investigated in detail. The data show clear evidence for effects that go beyond the fixed-order NLO QCD calculations. First of all, I would like to thank to the supervisor of my Thesis, Jaroslav Cvach, for his guidance, continuous support and encouragement and for great working conditions. During the time of our collaboration, he became more than a teacher and colleague for me. I am also grateful to Jiří Chýla, Marek Taševský, Alice Valkárová and Hannes Jung for many valuable discussions, suggestions and for they constant support, which largely exceeded their duty and even the usual level of collaboration. I especially appreciate the help from Jiří Chýla, who spent a lot of time with me even though he was occupied with other duties. I would also like to thank to

show abstract

Resolved $\gamma^*_L$ in hard collisions of virtual photons: QCD effects

Cited by 7 publications

References 9 publications

Accessing the gluon Wigner distribution in ultraperipheral pA collisions

Accessing the gluon Wigner distribution in ultraperipheral pA collisions

An NLO calculation of the electroproduction of large-E $_{\bot}$ hadrons

Measurement of dijet production at low Q 2 at HERA

Contact Info

Product

Resources

About