Measurement of the cross section for inclusive isolated-photon production in pp collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>13</mml:mn><mml:mtext> </mml:mtext><mml:mtext>TeV</mml:mtext></mml:math> using the ATLAS detector

Aaboud, M.; Berger, N.; Burger, A. M.; Delmastro, M.; Ciaccio, L. Di; Elles, S.; Grevtsov, K.; Guillemin, T.; Hrynʼova, T.; Jézéquel, S.; Koletsou, I.; Lafaye, R.; Levêque, J.; Mastrandea, P.; Sauvan, E.; Smart, B. H.; Todorova-Nová, Š.; Vallier, A.; Wingerter-Seez, I.; Yatsenko, E.; Aad, G.; Alstaty, M. I.; Barbero, M.; Calandri, A.; Calvet, T. P.; Corga, K. De Vasconcelos; Coadou, Y.; Diaconu, C.; Djama, F.; Ellajosyula, V.; Feligioni, L.; Hadef, A.; Hallewell, G. D.; Hubaut, F.; Kahn, S. J.; Knoops, E. B. F. G.; Kukla, R.; Guirriec, E. Le; Liu, K.; Madaffari, D.; Monnier, E.; Muanza, S.; Nagy, E.; Pralavorio, P.; Rozanov, A.; Talby, M.; Theveneaux-Pelzer, T.; Torres, R. E. Ticse; Tisserant, S.; Töth, J.; Touchard, F.; Vacavant, L.; Wolf, T. M. H.; Berlendis, S.; Camincher, C.; Collot, J.; Cŕéṕe-Renaudin, S.; Delsart, P. A.; Gabaldon, C.; Genest, M. H.; Gradin, P. O. J.; Hostachy, J-Y.; Ledroit-Guillon, F.; Lléres, A.; Lucotte, A.; Malek, F.; Meideck, T.; Petit, E.; Stark, J.; Trocmé, B.; Boumediene, D.; Busato, E.; Calvet, D.; Calvet, S.; Chomont, A. R.; Donini, J.; Ganguly, S.; Gris, Ph.; Madar, R.; Marjanović, M.; Pallin, D.; Santoni, C.; Vazeille, F.

doi:10.1016/j.physletb.2017.04.072

Cited by 46 publications

(76 citation statements)

References 61 publications

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“…For this study, we consider the prompt photon data determined by CMS at 7 TeV [32] and that of ATLAS at 8 [33] and 13 TeV [34]. The photon data are analyzed in the same manner as the inclusive jet data-namely we compute the invariant cross sections d 2 σ/E T dE T dη and plot the results as a function of (1-x R ) for fixed E T in order to determine AðE T ; sÞ and the (1-x R ) power-law indices.…”

Section: A Prompt Photon Productionmentioning

confidence: 99%

Radial scaling in inclusive jet production at hadron colliders

Taylor

2018

Phys. Rev. D

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Inclusive jet production in p-p and p ̅-p collisions shows many of the same kinematic systematics as observed in single particle inclusive production at much lower energies. In an earlier study (1974) a phenomenology, called radial scaling, was developed for the single particle inclusive cross sections that attempted to capture the essential underlying physics of point-like parton scattering and the fragmentation of partons into hadrons suppressed by the kinematic boundary. The phenomenology was successful in emphasizing the underlying systematics of the inclusive particle productions. Here we demonstrate that inclusive jet production at the LHC in high-energy p-p collisions and at the Tevatron in p ̅-p inelastic scattering show similar behavior. The ATLAS inclusive jet production plotted as a function of this scaling variable is studied for √s of 2.76, 7 and 13 TeV and is compared to p ̅-p inclusive jet production at 1.96 TeV measured at the CDF and D0 at the Tevatron and p-Pb inclusive jet production at the LHC ATLAS at √sNN = 5.02 TeV. Inclusive single particle production at FNAL fixed target and ISR energies are compared to inclusive J/ production at the LHC measured in ATLAS, CMS and LHCb. Striking common features of the data are discussed.

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Section: A Prompt Photon Productionmentioning

confidence: 99%

Radial scaling in inclusive jet production at hadron colliders

Taylor

2018

Phys. Rev. D

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“…Beyond FNAL energies at the LHC both ATLAS and CMS measured isolated prompt photon crosssections at √ s =7 TeV [139,140], CMS and ALICE provided data at 2.76 TeV [105,118], ATLAS and ALICE published results for 8 [118,141] and ATLAS for 13 Tev, too [142] (see Table I).…”

Section: Spectramentioning

confidence: 99%

Direct real photons in relativistic heavy ion collisions

David

2020

Rep. Prog. Phys.

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Direct real photons are arguably the most versatile tools to study relativistic heavy ion collisions. They are produced, by various mechanisms, during the entire space-time history of the strongly interacting system. Also, being colorless, most the time they escape without further interaction, i.e. they are penetrating probes. This makes them rich in information, but hard to decypher and interpret. This review presents the experimental and theoretical developments related to direct real photons since the 1970s, with a special emphasis on the recently emerged "direct photon puzzle", the simultaneous presence of large yields and strong azimuthal asymmetries of photons in heavy ion collisions, an observation that so far eluded full and coherent explanation. CONTENTS arXiv:1907.08893v1 [nucl-ex] 21 Jul 2019 21. Hydrodynamical models 48 2. Initial state, (fast) thermalization 50 3. Transport calculations 50 4. Other ideas 52 VII. Concluding remarks 54 VIII. Acknowledgements 55 References 56 3 I. INTRODUCTIONThe centuries old quest to reveal the "ultimate" constituents of matter and the laws of Nature governing them, and the realization from quantum mechanics that mapping smaller and smaller objects requires ever larger energy probes, made high energy physics one of the dominant scientific disciplines of the XXth century. At first we took advantage of the Universe as an "accelerator" providing high energy probes (cloud chamber and emulsion experiments), but soon we started to build our own accelerators, constantly increasing their energy and luminosity. The most spectacular and best known results came in elementary particle physics, but astrophysics and nuclear physics were a close second, benefiting enormously from the progress in experimental and theoretical tools. The central question in particle physics was the substructure of hadrons and the nature of confinement, while high energy nuclear physics' foremost concern was the behavior of high density nuclear matter, including its collectivity and possible phase transition into partonic matter, which in turn evoked the early stages of the Universe. Albeit particle and nuclear physics came with different perspectives, both were concerned with the strong interaction and its underlying theory, quantum chromodynamics (QCD), so the birth of a new discipline at their intersection, relativistic heavy ion physics, was almost inevitable. From Princeton and Berkeley to Dubna the race for larger and larger ions, energies and luminosities was on. Hadrons and nuclear fragments were studied extensively, and the applicability of thermo-and hydrodynamics gradually recognized. An excellent review of these first facilities and early developments -both experimental and theoretical -can be found in [1] by Goldhaber, while a (literally) insightful account of the genesis and achievements of RHIC and LHC was given by Baym in [2].Although lepton and photon production in hadronic and nuclear collisions was studied almost since the birth of quantum mechanics and quantum electrodynamics [3][4][...

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“…New measurements of inclusive prompt photon production [22] are also available. For this process the cross section is dominated by the u-gluon interactions at tree level.…”

Section: Heavy Flavour Top and Prompt Photon Productionmentioning

confidence: 99%

Constraints on the Parton Density Functions of the Proton by Measurements with the ATLAS Detector

Sutton¹

2018

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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Parton distribution functions (PDFs) are crucial ingredients for measurements at hadron colliders, since they describe the initial states and therefore critically impact the precision of cross section predictions for observables. This contribution will review recent precision analyses, where the PDFs play an important role and discuss the impact of several new ATLAS cross-section measurements on PDFs of the proton. Particular emphasis will be given to the determination of the strange and the gluon content of the proton.

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Measurement of the cross section for inclusive isolated-photon production in pp collisions at s=13 TeV using the ATLAS detector

Cited by 46 publications

References 61 publications

Radial scaling in inclusive jet production at hadron colliders

Radial scaling in inclusive jet production at hadron colliders

Direct real photons in relativistic heavy ion collisions

Constraints on the Parton Density Functions of the Proton by Measurements with the ATLAS Detector

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