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Центральне ексклюзивне продукування на LHCb

Центральне ексклюзивне продукування на LHCb

The LHCb collaboration has measured central exclusive production of J/ф, ф(2S), and ϒ mesons as well as J/фJ/ф, J/фф(2S), ф(2S)ф(2S), and xcxc meson pairs in proton-proton collisions. The analyses of ϒ and charmonium pairs are performed at the centre-of-mass energies of 7 TeV and 8 TeV, and those...

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Main Author: Van Hulse, C.
Format: Article
Language:English
Published: Publishing house "Academperiodika" 2019
Subjects:
exclusive photoproduction
ultra-peripheral collisions
generalised parton distributions
parton distribution functions
-
Online Access:https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019462
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spelling ujp2-article-20194622019-10-14T07:18:22Z Central Exclusive Production at LHCb Центральне ексклюзивне продукування на LHCb Van Hulse, C. exclusive photoproduction ultra-peripheral collisions generalised parton distributions parton distribution functions - The LHCb collaboration has measured central exclusive production of J/ф, ф(2S), and ϒ mesons as well as J/фJ/ф, J/фф(2S), ф(2S)ф(2S), and xcxc meson pairs in proton-proton collisions. The analyses of ϒ and charmonium pairs are performed at the centre-of-mass energies of 7 TeV and 8 TeV, and those of J/ф and ф(2S) are done at 7 TeV and 13 TeV. The analysis at 13 TeV involves the use of new shower counters. These allow a reduction in the background by vetoing events with activity in an extended region in rapidity. The measurements of central exclusive production at LHCb are sensitive to gluon distributions for Bjorken-x values down to 2×10−6 (at 13 TeV). An overview of the LHCb results is presented and compared to existing measurements of other experiments and theoretical calculations. Колаборацiя LHCb мiряла центральне ексклюзивне продукування мезонiв J/ф, ф(2S) i ϒ мезонiв, а також мезонних пар J/фJ/ф, J/фф(2S), ф(2S)ф(2S), xcxc в протон-протонних зiткненнях. Аналiз пар мезонiв ϒ та шармонiя виконано при енергiях в системi центра мас 7 та 8 ТеВ, а для J/ф та ф(2S) – при 7 та 13 ТеВ. В аналiзi при 13 ТеВ були задiянi новi лiчильники, якi зменшують фон вiдсiкаючи подiї з активнiстю в широкому iнтервалi швидкостей. Вимiри центрального ексклюзивного продукування на LHCb чутливi до глюонних розподiлiв для значень бйоркенiвської змiнної аж до 2 · 10−6 при 13 ТеВ. Нами представлено огляд результатiв LHCb та їх порiвняння з iснуючими вимiрами в iнших експериментах, а також з теоретичними обрахунками. Publishing house "Academperiodika" 2019-09-17 Article Article application/pdf https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019462 10.15407/ujpe64.7.595 Ukrainian Journal of Physics; Vol. 64 No. 7 (2019); 595 Український фізичний журнал; Том 64 № 7 (2019); 595 2071-0194 2071-0186 10.15407/ujpe64.7 en https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019462/1417 Copyright (c) 2019 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine
institution Ukrainian Journal of Physics
collection OJS
language English
topic exclusive photoproduction
ultra-peripheral collisions
generalised parton distributions
parton distribution functions
-
spellingShingle exclusive photoproduction
ultra-peripheral collisions
generalised parton distributions
parton distribution functions
-
Van Hulse, C.
Центральне ексклюзивне продукування на LHCb
topic_facet exclusive photoproduction
ultra-peripheral collisions
generalised parton distributions
parton distribution functions
-
format Article
author Van Hulse, C.
author_facet Van Hulse, C.
author_sort Van Hulse, C.
title Центральне ексклюзивне продукування на LHCb
title_short Центральне ексклюзивне продукування на LHCb
title_full Центральне ексклюзивне продукування на LHCb
title_fullStr Центральне ексклюзивне продукування на LHCb
title_full_unstemmed Центральне ексклюзивне продукування на LHCb
title_sort центральне ексклюзивне продукування на lhcb
title_alt Central Exclusive Production at LHCb
description The LHCb collaboration has measured central exclusive production of J/ф, ф(2S), and ϒ mesons as well as J/фJ/ф, J/фф(2S), ф(2S)ф(2S), and xcxc meson pairs in proton-proton collisions. The analyses of ϒ and charmonium pairs are performed at the centre-of-mass energies of 7 TeV and 8 TeV, and those of J/ф and ф(2S) are done at 7 TeV and 13 TeV. The analysis at 13 TeV involves the use of new shower counters. These allow a reduction in the background by vetoing events with activity in an extended region in rapidity. The measurements of central exclusive production at LHCb are sensitive to gluon distributions for Bjorken-x values down to 2×10−6 (at 13 TeV). An overview of the LHCb results is presented and compared to existing measurements of other experiments and theoretical calculations.
publisher Publishing house "Academperiodika"
publishDate 2019
url https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019462
work_keys_str_mv AT vanhulsec centralexclusiveproductionatlhcb
AT vanhulsec centralʹneeksklûzivneprodukuvannânalhcb
first_indexed 2023-03-24T08:58:08Z
last_indexed 2023-03-24T08:58:08Z
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