Česky
English
Výbor pro spolupráci ČR se Spojeným ústavem jaderných výzkumů Dubna Přihlášení
Search for vector-like quarks in events with two oppositely charged leptons and jets in proton-proton collisions at root s=13TeV

Autor
Sirunyan A.M. Yerevan Physics Institute, Armenia
Finger Miroslav, prof. Ing. DrSc. Matematicko-fyzikální fakulta UK v Praze
Finger Michael, M.Sc. CSc. Matematicko-fyzikální fakulta UK v Praze, SÚJV Dubna
et al.  různé instituce

Rok
2019

Časopis
EUROPEAN PHYSICAL JOURNAL C 79 (4) 364

Web


Obsah
A search for the pair production of heavy vector-like partners T and B of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton-proton collisions at . The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9 production include those where one of the T quarks decays via TtZ and the other via TbW, tZ, or tH, where H is a Higgs boson. For the BB case, final states include those where one of the B quarks decays via BbZ and the other BtW, bZ, or bH. Events with two oppositely charged electrons or muons, consistent with coming from the decay of a Z boson, and jets are investigated. The number of observed events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on the masses of the T and B quarks for a range of branching fractions. Assuming 100% branching fractions for TtZ, and BbZ, T and B quark mass values below 1280 and 1130 respectively, are excluded.

Příklad citace článku:
A. Sirunyan, M. Finger, M. Finger, . et al., "Search for vector-like quarks in events with two oppositely charged leptons and jets in proton-proton collisions at root s=13TeV", EUROPEAN PHYSICAL JOURNAL C 79 (4) 364 (2019)