Direct-photon production in high-energy collisions

Ferbel, T.; Molzon, W.

doi:10.1103/revmodphys.56.181

Cited by 104 publications

(45 citation statements)

References 99 publications

(39 reference statements)

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“…Such a measurement complements deepinelastic scattering, Drell-Yan pair production, and jet production measurements [1][2][3]. At the Large Hadron Collider (LHC) [4], a significant increase of center-ofmass energy with respect to previous collider experiments [5][6][7][8][9] allows the exploration of new kinematic regions in the hard-interaction processes in hadron-hadron collisions [10]. Isolated prompt photon production also represents a background to searches for new phenomena involving photons in the final state.…”

mentioning

confidence: 99%

Measurement of the Isolated Prompt Photon Production Cross Section inppCollisions ats=7 TeV

Khachatryan¹,

Sirunyan²,

Tumasyan³

et al. 2011

Phys. Rev. Lett.

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The differential cross section for the inclusive production of isolated prompt photons has been measured as a function of the photon transverse energy E T in pp collisions at ffiffi ffi s p ¼ 7 TeV using data recorded by the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2:9 pb À1 . Photons are required to have a pseudorapidity j j < 1:45 and E T > 21 GeV, covering the kinematic region 0:006 < x T < 0:086. The measured cross section is found to be in agreement with nextto-leading-order perturbative QCD calculations.

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confidence: 99%

Measurement of the Isolated Prompt Photon Production Cross Section inppCollisions ats=7 TeV

Khachatryan¹,

Sirunyan²,

Tumasyan³

et al. 2011

Phys. Rev. Lett.

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“…In addition, isolated prompt photon production represents a background to searches for new phenomena involving photons in the final state, including Higgs boson production [6]. At the Large Hadron Collider (LHC) [7], a significant increase of center-of-mass energy with respect to previous collider experiments [8][9][10][11][12][13] allows for the exploration of new kinematic regions in the hard scattering processes in hadron-hadron collisions. In high-energy pp collisions, single prompt photons are produced directly in qg Compton scattering and q " q annihilation, and in the fragmentation of partons with large transverse momentum.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the differential cross section for isolated prompt photon production inppcollisions at 7 TeV

Chatrchyan¹,

Khachatryan²,

Sirunyan³

et al. 2011

Phys. Rev. D

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A measurement of the differential cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a center-of-mass energy of 7 TeV is presented. The data sample corresponds to an integrated luminosity of 36 pb À1 recorded by the CMS detector at the LHC. The measurement covers the pseudorapidity range j j < 2:5 and the transverse energy range 25 < E T < 400 GeV, corresponding to the kinematic region 0:007 < x T < 0:114. Photon candidates are identified with two complementary methods, one based on photon conversions in the silicon tracker and the other on isolated energy deposits in the electromagnetic calorimeter. The measured cross section is presented as a function of E T in four pseudorapidity regions. The next-to-leading-order perturbative QCD calculations are consistent with the measured cross section.

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“…Prompt 7 production in hadronic collisions has been emphasized [1,2] in recent years as providing a detailed test of QCD. It is thus natural to investigate 2-7 production in the same theoretical context.…”

Section: Introductionmentioning

confidence: 99%

“…1 Laboratoire associ6 au Centre National de la Recherche Scientifique --(ii) The value of es: comparing 2 -V production, via qq--* 77, to single 7 inclusive production was proposed as a means of extracting ct s. Sticking to lowest order, this comparison is meaningful only if one gets rid of the less well-known QCD Compton q9 ~ q? contribution in single 7 production which involves the gluon structure function.…”

Section: Introductionmentioning

confidence: 99%

Largep T double photon production in hadronic collisions-beyond leading logarithm QCD calculation

Aurenche

Douiri

Baier

et al. 1985

Z. Phys. C - Particles and Fields

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Abstract. We calculate O(c~s) corrections to large Pr double photon production in hadronic collisions. We find that these corrections to the basic qq ~ 77 subprocess are important, preventing to describe double photon production on the basis of the leading logarithm approximation only. We give a phenomenological discussion of the results obtained at SPS, ISR and SpOS energies. In particular, we investigate how the effect of the intrinsic parton < ~c r) may be disentangled from the perturbative contribution. We also calculate the aplanarity distribution characteristic of 3 jet events.

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Direct-photon production in high-energy collisions

Cited by 104 publications

References 99 publications

Measurement of the Isolated Prompt Photon Production Cross Section inppCollisions ats=7 TeV

Measurement of the Isolated Prompt Photon Production Cross Section inppCollisions ats=7 TeV

Measurement of the differential cross section for isolated prompt photon production inppcollisions at 7 TeV

Largep T double photon production in hadronic collisions-beyond leading logarithm QCD calculation

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