Measurement of the c-jet mistagging efficiency in t ¯t events using pp collision data at √s = 13 TeV collected with the ATLAS detector

Measurement of the c-jet mistagging efficiency in t ¯t events using pp collision data at √s = 13 TeV collected with the ATLAS detector

A technique is presented to measure the efficiency with which c-jets are mistagged as b-jets (mistagging efficiency) using t (t) over bar events, where one of theW bosons decays into an electron or muon and a neutrino and the other decays into a quark-antiquark pair. The measurement utilises the rel...

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Bibliographic Details
Published in:The European Physical Journal C Vol. 82, № 1. P. 95 (1-27)
Other Authors: Aad, G., Abbott, B., Abbott, D. C., Aliev, M., Kostyukhin, Vadim V., Kuchinskaya, Olesya I., Penzin, Maxim S.
Format: Article
Language:English
Subjects:
протон-протонные столкновения
ATLAS, детектор
статьи в журналах
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001003908
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245 1 0 |a Measurement of the c-jet mistagging efficiency in t ¯t events using pp collision data at √s = 13 TeV collected with the ATLAS detector  |c G. Aad, B. Abbott, D. C. Abbott [et al.] 
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504 |a Библиогр.: 67 назв. 
520 3 |a A technique is presented to measure the efficiency with which c-jets are mistagged as b-jets (mistagging efficiency) using t (t) over bar events, where one of theW bosons decays into an electron or muon and a neutrino and the other decays into a quark-antiquark pair. The measurement utilises the relatively large and known W -> cs branching ratio, which allows ameasurement to be made in an inclusive c-jet sample. The data sample used was collected by the ATLAS detector at root s = 13 TeV and corresponds to an integrated luminosity of 139 fb(-1). Events are reconstructed using a kinematic likelihood technique which selects the mapping between jets and t (t) over bar decay products that yields the highest likelihood value. The distribution of the b-tagging discriminant for jets from the hadronic W decays in data is compared with that in simulation to extract the mistagging efficiency as a function of jet transverse momentum. The total uncertainties are in the range 3-17%. The measurements generally agree with those in simulation but there are some differences in the region corresponding to the most stringent b-jet tagging requirement. 
653 |a протон-протонные столкновения 
653 |a ATLAS, детектор 
655 4 |a статьи в журналах 
700 1 |a Aad, G. 
700 1 |a Abbott, B. 
700 1 |a Abbott, D. C. 
700 1 |a Aliev, M. 
700 1 |a Kostyukhin, Vadim V. 
700 1 |a Kuchinskaya, Olesya I. 
700 1 |a Penzin, Maxim S. 
773 0 |t The European Physical Journal C  |d 2022  |g Vol. 82, № 1. P. 95 (1-27)  |x 1434-6044 
852 4 |a RU-ToGU 
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908 |a статья 
999 |c 1003908  |d 1003908 

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