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001-es BibID:	BIBFORM116587
035-os BibID:	(cikkazonosító)60 (Scopus)85168275841 (WoS)001035579500001
Első szerző:	CMS Collaboration
Cím:	Search for top squarks in the four-body decay mode with single lepton final states in proton-proton collisions at root{s}=13 TeV / The CMS Collaboration
Dátum:	2023
ISSN:	1126-6708 1029-8479
Megjegyzések:	A search for the pair production of the lightest supersymmetric partner of the top quark, the top squark ((t) over tilde (1)), is presented. The search targets the four-body decay of the (t) over tilde (1), which is preferred when the mass difference between the top squark and the lightest supersymmetric particle is smaller than the mass of the W boson. This decay mode consists of a bottom quark, two other fermions, and the lightest neutralino ( (x) over tilde (0)(1)), which is assumed to be the lightest supersymmetric particle. The data correspond to an integrated luminosity of 138 fb(-1) of proton-proton collisions at a center-of-mass energy of 13TeV collected by the CMS experiment at the CERN LHC. Events are selected using the presence of a high-momentum jet, an electron or muon with low transverse momentum, and a significant missing transverse momentum. The signal is selected based on a multivariate approach that is optimized for the difference between m( (t) over tilde (1)) and m( (x) over tilde (0)(1)). The contribution from leading background processes is estimated from data. No significant excess is observed above the expectation from standard model processes. The results of this search exclude top squarks at 95% confidence level for masses up to 480 and 700 GeV for m( (t) over tilde (1))- m( (x) over tilde (0)(1)) = 10 and 80 GeV, respectively.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Hadron-Hadron Scattering Supersymmetry Top Squark
Megjelenés:	Journal of High Energy Physics. - 2023 : 6 (2023), p. 1-51. -
További szerzők:	Tumasyan, Armen Adam, Wolfgang Andrejkovic, J.W. Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Pályázati támogatás:	NKFIH K 124845 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM118250
035-os BibID:	(Scopus)85182846237 (WoS)001090971800001 (cikkazonosító)051
Első szerző:	CMS Collaboration
Cím:	Search for new physics in the ? lepton plus missing transverse momentum final state in proton-proton collisions at ?s=13 TeV / The CMS Collaboration
Dátum:	2023
ISSN:	1126-6708 1029-8479
Megjegyzések:	A search for physics beyond the standard model (SM) in the final state with a hadronically decaying tau lepton and a neutrino is presented. This analysis is based on data recorded by the CMS experiment from proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC, corresponding to a total integrated luminosity of 138 fb ?1. The transverse mass spectrum is analyzed for the presence of new physics. No significant deviation from the SM prediction is observed. Limits are set on the production cross section of a W· boson decaying into a tau lepton and a neutrino. Lower limits are set on the mass of the sequential SM-like heavy charged vector boson and the mass of a quantum black hole. Upper limits are placed on the couplings of a new boson to the SM fermions. Constraints are put on a nonuniversal gauge interaction model and an effective field theory model. For the first time, upper limits on the cross section of t-channel leptoquark (LQ) exchange are presented. These limits are translated into exclusion limits on the LQ mass and on its coupling in the t-channel. The sensitivity of this analysis extends into the parameter space of LQ models that attempt to explain the anomalies observed in B meson decays. The limits presented for the various interpretations are the most stringent to date. Additionally, a model-independent limit is provided.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Beyond Standard Model Hadron-Hadron Scattering Tau Physics
Megjelenés:	Journal of High Energy Physics. - 2023 : 9 (2023), p. 1-52. -
További szerzők:	Tumasyan, Armen Adam, Wolfgang Andrejkovic, J.W. Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Pályázati támogatás:	K 124845 Egyéb K 124850 Egyéb K 128713 Egyéb K 128786 Egyéb K 129058 Egyéb K 131991 Egyéb K 133046 Egyéb K 138136 Egyéb K 143460 Egyéb K 143477 Egyéb 2020-2.2.1-ED-2021-00181 Egyéb TKP2021-NKTA-64 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: