The inclusive production rates of isolated, prompt photons in p+Pb collisions at sNN=8.16 TeV are studied with the ATLAS detector at the Large Hadron Collider using a dataset with an integrated luminosity of 165 nb−1 recorded in 2016. The cross-section and nuclear modification factor RpPb are measured as a function of photon transverse energy from 20 GeV to 550 GeV and in three nucleon–nucleon centre-of-mass pseudorapidity regions, (−2.83,−2.02), (−1.84,0.91), and (1.09,1.90). The cross-section and RpPb values are compared with the results of a next-to-leading-order perturbative QCD calculation, with and without nuclear parton distribution function modifications, and with expectations based on a model of the energy loss of partons prior to the hard scattering. The data disfavour a large amount of energy loss and provide new constraints on the parton densities in nuclei.

Measurement of prompt photon production in sNN=8.16 TeV p + Pb collisions with ATLAS / Aaboud, M., Aad, G., Abbott, B., Abbott, D.C., Abdinov, O., Abeloos, B., Abhayasinghe, D.K., Abidi, S.H., Abouzeid, O.S., Abraham, N.L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.S., Adachi, S., Adam, L., Adamczyk, L., Adamek, L., Adelman, J., Adersberger, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 796:(2019), pp. 230-252. [10.1016/j.physletb.2019.07.031]

Measurement of prompt photon production in sNN=8.16 TeV p + Pb collisions with ATLAS

Follega F. M.;Iuppa R.;Ricci E.;
2019-01-01

Abstract

The inclusive production rates of isolated, prompt photons in p+Pb collisions at sNN=8.16 TeV are studied with the ATLAS detector at the Large Hadron Collider using a dataset with an integrated luminosity of 165 nb−1 recorded in 2016. The cross-section and nuclear modification factor RpPb are measured as a function of photon transverse energy from 20 GeV to 550 GeV and in three nucleon–nucleon centre-of-mass pseudorapidity regions, (−2.83,−2.02), (−1.84,0.91), and (1.09,1.90). The cross-section and RpPb values are compared with the results of a next-to-leading-order perturbative QCD calculation, with and without nuclear parton distribution function modifications, and with expectations based on a model of the energy loss of partons prior to the hard scattering. The data disfavour a large amount of energy loss and provide new constraints on the parton densities in nuclei.
2019
Aaboud, M.; Aad, G.; Abbott, B.; Abbott, D. C.; Abdinov, O.; Abeloos, B.; Abhayasinghe, D. K.; Abidi, S. H.; Abouzeid, O. S.; Abraham, N. L.; Abramowi...espandi
Measurement of prompt photon production in sNN=8.16 TeV p + Pb collisions with ATLAS / Aaboud, M., Aad, G., Abbott, B., Abbott, D.C., Abdinov, O., Abeloos, B., Abhayasinghe, D.K., Abidi, S.H., Abouzeid, O.S., Abraham, N.L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.S., Adachi, S., Adam, L., Adamczyk, L., Adamek, L., Adelman, J., Adersberger, M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 796:(2019), pp. 230-252. [10.1016/j.physletb.2019.07.031]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/318419
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