Hard production of a Z boson plus heavy flavor jets at LHC and the intrinsic charm content of a proton

被引：11

作者：

Lipatov, A. V. ^{[1
,2
]}

Lykasov, G. I. ^{[2
]}

Malyshev, M. A. ^{[1
]}

Prokhorov, A. A. ^{[2
,3
]}

Turchikhin, S. M. ^{[2
]}

机构：

[1] Lomonosov Moscow State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

[2] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[3] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

来源：

PHYSICAL REVIEW D | 2018年 / 97卷 / 11期

关键词：

SMALL-X PHENOMENOLOGY; QUARK PRODUCTION; COLLISIONS; COHERENCE;

D O I：

10.1103/PhysRevD.97.114019

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The cross section of associated production of a Z boson with heavy flavor jets in pp collisions is calculated using the SHERPA Monte Carlo generator and the analytical combined QCD approach based on k(T) factorization at small x and conventional collinear QCD at large x. A satisfactory description of the ATLAS and CMS data on the p(T) spectra of Z bosons and c jets in the whole rapidity, y, region is shown. Searching for the intrinsic charm (IC) contribution in these processes, which could be visible at large y > 1.5, we study observables very sensitive to nonzero IC contributions and less affected by theoretical QCD scale uncertainties. One of such observables is the so-called double ratio, the ratio of the differential cross section of Z thorn c production in the central region of vertical bar y vertical bar < 1.5 and in the forward region 1.5 < vertical bar y vertical bar < 2.5, divided by the same ratio for Z + b production. These observables could be more promising for the search of IC at LHC as compared to the observables considered earlier.

引用

页数：9

共 38 条

[1] Measurement of differential cross sections of isolated-photon plus heavy-flavour jet production in pp collisions at √s=8 TeV using the ATLAS detector [J].

Aaboudd, M. ;

Aad, G. ;

Abbott, B. ;

Abdinov, O. ;

Abeloos, B. ;

Abidi, S. H. ;

AbouZeid, O. S. ;

Abraham, N. L. ;

Abramowicz, H. ;

Abreu, H. ;

Abreu, R. ;

Abulaitia, Y. ;

Acharya, B. S. ;

Adachi, S. ;

Adamczyk, L. ;

Adelman, J. ;

Adersberger, M. ;

Adye, T. ;

Affolder, A. A. ;

Afik, Y. ;

Agheorghiesei, C. ;

Aguilar-Saavedra, J. A. ;

Ahlen, S. P. ;

Ahmadov, F. ;

Aiellia, G. ;

Akatsuka, S. ;

Akerstedt, H. ;

Akesson, T. P. A. ;

Akilli, E. ;

Akimov, A. V. ;

Alberghi, G. L. ;

Albert, J. ;

Albicocco, P. ;

Alconada Verzini, M. J. ;

Alderweireldt, S. C. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alexa, C. ;

Alexander, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Ali, B. ;

Aliev, M. ;

Alimonti, G. ;

Alison, J. ;

Alkire, S. P. ;

Allbrooke, B. M. M. ;

Allen, W. ;

Allport, P. P. ;

Aloisio, A. .

PHYSICS LETTERS B, 2018, 776 :295-317

[2] Measurement of differential production cross-sections for a Z boson in association with b-jets in 7 TeV proton-proton collisions with the ATLAS detector [J].

Aad, G. ;

Abbott, B. ;

Abdallah, J. ;

Khalek, S. Abdel ;

Abdinov, O. ;

Aben, R. ;

Abi, B. ;

Abolins, M. ;

AbouZeid, O. S. ;

Abramowicz, H. ;

Abreu, H. ;

Abreu, R. ;

Abulaiti, Y. ;

Acharya, B. S. ;

Adamczyk, L. ;

Adams, D. L. ;

Adelman, J. ;

Adomeit, S. ;

Adye, T. ;

Agatonovic-Jovin, T. ;

Aguilar-Saavedra, J. A. ;

Agustoni, M. ;

Ahlen, S. P. ;

Ahmadov, F. ;

Aielli, G. ;

Akerstedt, H. ;

Akesson, A. ;

Akimoto, G. ;

Akimov, A. V. ;

Alberghi, G. L. ;

Albert, J. ;

Albrand, S. ;

Alconada Verzini, M. J. ;

Aleksa, M. ;

Aleksandrov, I. N. ;

Alexa, C. ;

Alexander, G. ;

Alexandre, G. ;

Alexopoulos, T. ;

Alhroob, M. ;

Alimonti, G. ;

Alio, L. ;

Alison, J. ;

Allbrooke, B. M. M. ;

Allison, L. J. ;

Allport, P. P. ;

Almond, J. ;

Aloisio, A. ;

Alonso, A. ;

Alonso, F. .

JOURNAL OF HIGH ENERGY PHYSICS, 2014, (10) :1-49

[3] Small-x phenomenology -: Summary of the 3rd Lund small-x workshop in 2004 [J].

Andersen, J. R. ;

Baranov, S. ;

Bartels, J. ;

Barnafoldi, G. G. ;

Chachamis, G. ;

Collins, J. ;

Grindhammer, G. ;

Gustafson, G. ;

Hansson, M. ;

Ingelman, G. ;

Jung, H. ;

Jonsson, L. ;

Knutsson, A. ;

Kowalski, H. ;

Kutak, K. ;

Kyrieleis, A. ;

Levai, P. ;

Lipatov, A. ;

Lonnblad, L. ;

Lublinsky, M. ;

Marchesini, G. ;

Milcewicz, I. ;

Risler, C. ;

Sabio-Vera, A. ;

Sjodahl, M. ;

Stasto, A. ;

Turnau, J. ;

Watt, G. ;

Zotov, N. .

EUROPEAN PHYSICAL JOURNAL C, 2006, 48 (01) :53-105

[4] Small-x phenomenology -: summary and status 2002 [J].

Andersen, JR ;

Baranov, S ;

Collins, J ;

Dokshitzer, Y ;

Goerlich, L ;

Grindhammer, G ;

Gustafson, G ;

Jönsson, L ;

Jung, H ;

Kwiecinski, J ;

Levin, E ;

Lipatov, A ;

Lonnblad, L ;

Lublinsky, M ;

Maul, M ;

Milcewicz, I ;

Miu, G ;

Nowak, G ;

Sjöstrand, T ;

Stasto, A ;

Tîmneanu, N ;

Turnau, J ;

Zotov, N .

EUROPEAN PHYSICAL JOURNAL C, 2004, 35 (01) :67-98

[5] Small x phenomenology:: summary and status [J].

Andersson, B ;

Baranov, S ;

Bartels, J ;

Ciafaloni, M ;

Collins, J ;

Davidsson, M ;

Gustafson, G ;

Jung, H ;

Jönsson, L ;

Karlsson, M ;

Kimber, M ;

Kotikov, A ;

Kwiecnski, J ;

Lönnblad, L ;

Miu, G ;

Salam, G ;

Seymour, MH ;

Sjöstrand, T ;

Zotov, N .

EUROPEAN PHYSICAL JOURNAL C, 2002, 25 (01) :77-101

[6] A determination of the charm content of the proton [J].

Ball, Richard D. ;

Bertone, Valerio ;

Bonvini, Marco ;

Carrazza, Stefano ;

Forte, Stefano ;

Guffanti, Alberto ;

Hartland, Nathan P. ;

Rojo, Juan ;

Rottoli, Luca .

EUROPEAN PHYSICAL JOURNAL C, 2016, 76 (11)

[7]

Baranov SP, 2017, EUR PHYS J C, V77, DOI 10.1140/epjc/s10052-017-5369-5

[8] Search for intrinsic charm in vector boson production accompanied by heavy-flavor jets [J].

Beauchemin, P. -H. ;

Bednyakov, V. A. ;

Lykasov, G. I. ;

Stepanenko, Yu. Yu. .

PHYSICAL REVIEW D, 2015, 92 (03)

[9] Searching for intrinsic charm in the proton at the LHC [J].

Bednyakov, V. A. ;

Demichev, M. A. ;

Lykasov, G. I. ;

Stavreva, T. ;

Stockton, M. .

PHYSICS LETTERS B, 2014, 728 :602-606

[10]

Bednyakov V. A., ARXIV171209096

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