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

The ATLAS Collaboration

doi:10.1016/j.physletb.2019.07.031

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

The ATLAS Collaboration

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Abstract

The inclusive production rates of isolated, prompt photons in p + Pb collisions at √s_NN = 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 R_pPb 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 R_pPb 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.

Original language	English
Pages (from-to)	230-252
Number of pages	23
Journal	Physics Letters B
Volume	796
DOIs	https://doi.org/10.1016/j.physletb.2019.07.031
Publication status	Published - 10 Sept 2019
Externally published	Yes

Bibliographical note

Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Access to Document

10.1016/j.physletb.2019.07.031Licence: CC BY

Publisher version (open access)Final published version, 2.25 MBLicence: CC BY

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@article{17e7f487237e447f81aacee5a424dfff,

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

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.",

author = "\{The ATLAS Collaboration\} and M. Aaboud and G. Aad and B. Abbott and Abbott, \{D. C.\} and O. Abdinov and B. Abeloos and Abhayasinghe, \{D. K.\} and Abidi, \{S. H.\} and AbouZeid, \{O. S.\} and Abraham, \{N. L.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and S. Adachi and L. Adam and L. Adamczyk and L. Adamek and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, \{J. A.\} and F. Ahmadov and G. Aielli and S. Akatsuka and {\AA}kesson, \{T. P.A.\} and E. Akilli and Akimov, \{A. V.\} and Alberghi, \{G. L.\} and J. Albert and P. Albicocco and \{Alconada Verzini\}, \{M. J.\} and S. Alderweireldt and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and D. Alexandre and T. Alexopoulos and M. Alhroob and B. Ali and G. Alimonti and J. Alison and Alkire, \{S. P.\} and C. Allaire and Allbrooke, \{B. M.M.\} and Allen, \{B. W.\} and Allport, \{P. P.\} and A. Aloisio and A. Alonso and F. Alonso and C. Alpigiani and Alshehri, \{A. A.\} and Alstaty, \{M. I.\} and \{Alvarez Gonzalez\}, B. and \{{\'A}lvarez Piqueras\}, D. and Alviggi, \{M. G.\} and Amadio, \{B. T.\} and \{Amaral Coutinho\}, Y. and A. Ambler and L. Ambroz and C. Amelung and D. Amidei and \{Amor Dos Santos\}, \{S. P.\} and S. Amoroso and Amrouche, \{C. S.\} and F. An and C. Anastopoulos and Ancu, \{L. S.\} and N. Andari and T. Andeen and Anders, \{C. F.\} and Anders, \{J. K.\} and A. Andreazza and V. Andrei and Anelli, \{C. R.\} and S. Angelidakis and I. Angelozzi and A. Angerami and Anisenkov, \{A. V.\} and A. Annovi and C. Antel and Anthony, \{M. T.\} and M. Antonelli and Antrim, \{D. J.A.\} and F. Anulli and M. Aoki and \{Aparisi Pozo\}, \{J. A.\} and \{Aperio Bella\}, L. and G. Arabidze and Araque, \{J. P.\} and \{Araujo Ferraz\}, V. and \{Araujo Pereira\}, R. and Arce, \{A. T.H.\} and Ardell, \{R. E.\} and Arduh, \{F. A.\} and Arguin, \{J. F.\} and S. Argyropoulos and Arling, \{J. H.\} and Armbruster, \{A. J.\} and Armitage, \{L. J.\} and A. Armstrong and O. Arnaez and H. Arnold and M. Arratia and O. Arslan and A. Artamonov and G. Artoni and S. Artz and S. Asai and N. Asbah and Asimakopoulou, \{E. M.\} and L. Asquith and K. Assamagan and R. Astalos and Atkin, \{R. J.\} and M. Atkinson and Atlay, \{N. B.\} and K. Augsten and G. Avolio and R. Avramidou and Ayoub, \{M. K.\} and Azoulay, \{A. M.\} and G. Azuelos and Baas, \{A. E.\} and Baca, \{M. J.\} and H. Bachacou and K. Bachas and M. Backes and P. Bagnaia and M. Bahmani and H. Bahrasemani and Bailey, \{A. J.\} and Bailey, \{V. R.\} and Baines, \{J. T.\} and M. Bajic and C. Bakalis and Baker, \{O. K.\} and Bakker, \{P. J.\} and \{Bakshi Gupta\}, D. and S. Balaji and Baldin, \{E. M.\} and P. Balek and F. Balli and Balunas, \{W. K.\} and J. Balz and E. Banas and A. Bandyopadhyay and S. Banerjee and Bannoura, \{A. A.E.\} and L. Barak and Barbe, \{W. M.\} and Barberio, \{E. L.\} and D. Barberis and M. Barbero and T. Barillari and Barisits, \{M. S.\} and J. Barkeloo and T. Barklow and R. Barnea and Barnes, \{S. L.\} and Barnett, \{B. M.\} and Barnett, \{R. M.\} and Z. Barnovska-Blenessy and A. Baroncelli and G. Barone and Barr, \{A. J.\} and \{Barranco Navarro\}, L. and F. Barreiro and \{Barreiro Guimar{\~a}es da Costa\}, J. and R. Bartoldus and Barton, \{A. E.\} and P. Bartos and A. Basalaev and A. Bassalat and Bates, \{R. L.\} and Batista, \{S. J.\} and S. Batlamous and Batley, \{J. R.\} and M. Battaglia and M. Bauce and F. Bauer and Bauer, \{K. T.\} and Bawa, \{H. S.\} and Beacham, \{J. B.\} and T. Beau and Beauchemin, \{P. H.\} and P. Bechtle and Beck, \{H. C.\} and Beck, \{H. P.\} and K. Becker and M. Becker and C. Becot and Beddall, \{A. J.\} and Beddall, \{A. J.\} and Bednyakov, \{V. A.\} and M. Bedognetti and Bee, \{C. P.\} and Beermann, \{T. A.\} and M. Begalli and M. Begel and A. Behera and Behr, \{J. K.\} and F. Beisiegel and Bell, \{A. S.\} and G. Bella and L. Bellagamba and A. Bellerive and M. Bellomo and P. Bellos and K. Belotskiy and Belyaev, \{N. L.\} and O. Benary and D. Benchekroun and M. Bender and N. Benekos and Y. Benhammou and \{Benhar Noccioli\}, E. and J. Benitez and Benjamin, \{D. P.\} and M. Benoit and Bensinger, \{J. R.\} and S. Bentvelsen and L. Beresford and M. Beretta and D. Berge and \{Bergeaas Kuutmann\}, E. and N. Berger and B. Bergmann and Bergsten, \{L. J.\} and J. Beringer and S. Berlendis and Bernard, \{N. R.\} and G. Bernardi and C. Bernius and Bernlochner, \{F. U.\} and T. Berry and P. Berta and C. Bertella and G. Bertoli and Bertram, \{I. A.\} and Besjes, \{G. J.\} and \{Bessidskaia Bylund\}, O. and M. Bessner and N. Besson and A. Bethani and S. Shojaii",

note = "Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.",

year = "2019",

month = sep,

day = "10",

doi = "10.1016/j.physletb.2019.07.031",

language = "English",

volume = "796",

pages = "230--252",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

TY - JOUR

T1 - Measurement of prompt photon production in √sNN = 8.16 TeV p + Pb collisions with ATLAS

AU - The ATLAS Collaboration

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abbott, D. C.

AU - Abdinov, O.

AU - Abeloos, B.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - AbouZeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adachi, S.

AU - Adam, L.

AU - Adamczyk, L.

AU - Adamek, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Alconada Verzini, M. J.

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexandre, D.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Ali, B.

AU - Alimonti, G.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allaire, C.

AU - Allbrooke, B. M.M.

AU - Allen, B. W.

AU - Allport, P. P.

AU - Aloisio, A.

AU - Alonso, A.

AU - Alonso, F.

AU - Alpigiani, C.

AU - Alshehri, A. A.

AU - Alstaty, M. I.

AU - Alvarez Gonzalez, B.

AU - Álvarez Piqueras, D.

AU - Alviggi, M. G.

AU - Amadio, B. T.

AU - Amaral Coutinho, Y.

AU - Ambler, A.

AU - Ambroz, L.

AU - Amelung, C.

AU - Amidei, D.

AU - Amor Dos Santos, S. P.

AU - Amoroso, S.

AU - Amrouche, C. S.

AU - An, F.

AU - Anastopoulos, C.

AU - Ancu, L. S.

AU - Andari, N.

AU - Andeen, T.

AU - Anders, C. F.

AU - Anders, J. K.

AU - Andreazza, A.

AU - Andrei, V.

AU - Anelli, C. R.

AU - Angelidakis, S.

AU - Angelozzi, I.

AU - Angerami, A.

AU - Anisenkov, A. V.

AU - Annovi, A.

AU - Antel, C.

AU - Anthony, M. T.

AU - Antonelli, M.

AU - Antrim, D. J.A.

AU - Anulli, F.

AU - Aoki, M.

AU - Aparisi Pozo, J. A.

AU - Aperio Bella, L.

AU - Arabidze, G.

AU - Araque, J. P.

AU - Araujo Ferraz, V.

AU - Araujo Pereira, R.

AU - Arce, A. T.H.

AU - Ardell, R. E.

AU - Arduh, F. A.

AU - Arguin, J. F.

AU - Argyropoulos, S.

AU - Arling, J. H.

AU - Armbruster, A. J.

AU - Armitage, L. J.

AU - Armstrong, A.

AU - Arnaez, O.

AU - Arnold, H.

AU - Arratia, M.

AU - Arslan, O.

AU - Artamonov, A.

AU - Artoni, G.

AU - Artz, S.

AU - Asai, S.

AU - Asbah, N.

AU - Asimakopoulou, E. M.

AU - Asquith, L.

AU - Assamagan, K.

AU - Astalos, R.

AU - Atkin, R. J.

AU - Atkinson, M.

AU - Atlay, N. B.

AU - Augsten, K.

AU - Avolio, G.

AU - Avramidou, R.

AU - Ayoub, M. K.

AU - Azoulay, A. M.

AU - Azuelos, G.

AU - Baas, A. E.

AU - Baca, M. J.

AU - Bachacou, H.

AU - Bachas, K.

AU - Backes, M.

AU - Bagnaia, P.

AU - Bahmani, M.

AU - Bahrasemani, H.

AU - Bailey, A. J.

AU - Bailey, V. R.

AU - Baines, J. T.

AU - Bajic, M.

AU - Bakalis, C.

AU - Baker, O. K.

AU - Bakker, P. J.

AU - Bakshi Gupta, D.

AU - Balaji, S.

AU - Baldin, E. M.

AU - Balek, P.

AU - Balli, F.

AU - Balunas, W. K.

AU - Balz, J.

AU - Banas, E.

AU - Bandyopadhyay, A.

AU - Banerjee, S.

AU - Bannoura, A. A.E.

AU - Barak, L.

AU - Barbe, W. M.

AU - Barberio, E. L.

AU - Barberis, D.

AU - Barbero, M.

AU - Barillari, T.

AU - Barisits, M. S.

AU - Barkeloo, J.

AU - Barklow, T.

AU - Barnea, R.

AU - Barnes, S. L.

AU - Barnett, B. M.

AU - Barnett, R. M.

AU - Barnovska-Blenessy, Z.

AU - Baroncelli, A.

AU - Barone, G.

AU - Barr, A. J.

AU - Barranco Navarro, L.

AU - Barreiro, F.

AU - Barreiro Guimarães da Costa, J.

AU - Bartoldus, R.

AU - Barton, A. E.

AU - Bartos, P.

AU - Basalaev, A.

AU - Bassalat, A.

AU - Bates, R. L.

AU - Batista, S. J.

AU - Batlamous, S.

AU - Batley, J. R.

AU - Battaglia, M.

AU - Bauce, M.

AU - Bauer, F.

AU - Bauer, K. T.

AU - Bawa, H. S.

AU - Beacham, J. B.

AU - Beau, T.

AU - Beauchemin, P. H.

AU - Bechtle, P.

AU - Beck, H. C.

AU - Beck, H. P.

AU - Becker, K.

AU - Becker, M.

AU - Becot, C.

AU - Beddall, A. J.

AU - Bednyakov, V. A.

AU - Bedognetti, M.

AU - Bee, C. P.

AU - Beermann, T. A.

AU - Begalli, M.

AU - Begel, M.

AU - Behera, A.

AU - Behr, J. K.

AU - Beisiegel, F.

AU - Bell, A. S.

AU - Bella, G.

AU - Bellagamba, L.

AU - Bellerive, A.

AU - Bellomo, M.

AU - Bellos, P.

AU - Belotskiy, K.

AU - Belyaev, N. L.

AU - Benary, O.

AU - Benchekroun, D.

AU - Bender, M.

AU - Benekos, N.

AU - Benhammou, Y.

AU - Benhar Noccioli, E.

AU - Benitez, J.

AU - Benjamin, D. P.

AU - Benoit, M.

AU - Bensinger, J. R.

AU - Bentvelsen, S.

AU - Beresford, L.

AU - Beretta, M.

AU - Berge, D.

AU - Bergeaas Kuutmann, E.

AU - Berger, N.

AU - Bergmann, B.

AU - Bergsten, L. J.

AU - Beringer, J.

AU - Berlendis, S.

AU - Bernard, N. R.

AU - Bernardi, G.

AU - Bernius, C.

AU - Bernlochner, F. U.

AU - Berry, T.

AU - Berta, P.

AU - Bertella, C.

AU - Bertoli, G.

AU - Bertram, I. A.

AU - Besjes, G. J.

AU - Bessidskaia Bylund, O.

AU - Bessner, M.

AU - Besson, N.

AU - Bethani, A.

AU - Shojaii, S.

N1 - Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2019/9/10

Y1 - 2019/9/10

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/85069881218

U2 - 10.1016/j.physletb.2019.07.031

DO - 10.1016/j.physletb.2019.07.031

M3 - Article

AN - SCOPUS:85069881218

SN - 0370-2693

VL - 796

SP - 230

EP - 252

JO - Physics Letters B

JF - Physics Letters B

ER -

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

Abstract

Bibliographical note

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Cite this

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

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this

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