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Pregled bibliografske jedinice broj: 875684

Search for top squark pair production in compressed-mass- spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable


(CMS) Khachatryan, Vardan; ...; Pleština, R.; ...; Godinović, Nikola; Lelas, Damir; Puljak, Ivica; ...; Antunović, Željko; Kovač, Marko et al.
Search for top squark pair production in compressed-mass- spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable // Physics letters. B, 767 (2017), 403-430 doi:10.1016/j.physletb.2017.02.007 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 875684 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Search for top squark pair production in compressed-mass- spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable

Autori
Khachatryan, Vardan ; ... ; Pleština, R. ; ... ; Godinović, Nikola ; Lelas, Damir ; Puljak, Ivica ; ... ; Antunović, Željko ; Kovač, Marko ; Brigljević, Vuko ; Kadija, Krešo ; Luetić, Jelena ; Mićanović, Saša ; Sudić, Lucija ; ... ; Morović, Srećko ; ... ; Ferenček, Dinko ; ... ; Đurić, Senka ; ... ; Woods, Nate

Kolaboracija
CMS

Izvornik
Physics letters. B (0370-2693) 767 (2017); 403-430

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
high energy physics ; experimental particle physics ; LHC ; CMS ; standard model

Sažetak
An inclusive search is performed for supersymmetry in final states containing jets and an apparent imbalance in transverse momentum, pt[miss], due to the production of unobserved weakly interacting particles in pp collisions at a centre-of-mass energy of 8 TeV. The data, recorded with the CMS detector at the CERN LHC, correspond to an integrated luminosity of 18.5 inverse femtobarns. The dimensionless kinematic variable alpha[T] is used to discriminate between events with genuine pt[miss] associated with unobserved particles and spurious values of pt[miss] arising from jet energy mismeasurements. No excess of event yields above the expected standard model backgrounds is observed. The results are interpreted in terms of constraints on the parameter space of several simplified models of supersymmetry that assume the pair production of top squarks. The search provides sensitivity to a broad range of top squark decay modes, including the two-body decay top squark to c chi0, where c is a charm quark and chi0 is the lightest neutralino, as well as the four-body decay top squark to b f f' chi0, where b is a bottom quark and f and f' are fermions produced in the decay of an intermediate off- shell W boson. These modes dominate in scenarios in which the top squark and lightest neutralino are nearly degenerate in mass. For these modes, top squarks with masses as large as 260 and 230 GeV are excluded, respectively, for the two- and four-body decays.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2013-11-7118 - Mjerenje svojstava Higgsovog bozona i potraga za novom fizikom detektorom CMS (Ivica Puljak, )
HRZZ-IS-09.01/346 - Potraga za novim standardnim modelom elementarnih čestica na LHC-u: od preciznih mjerenja elektroslabih procesa do direktnih potraga za novom fizikom (Vuko Brigljević, )

Ustanove
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Split

Citiraj ovu publikaciju

(CMS) Khachatryan, Vardan; ...; Pleština, R.; ...; Godinović, Nikola; Lelas, Damir; Puljak, Ivica; ...; Antunović, Željko; Kovač, Marko et al.
Search for top squark pair production in compressed-mass- spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable // Physics letters. B, 767 (2017), 403-430 doi:10.1016/j.physletb.2017.02.007 (međunarodna recenzija, članak, znanstveni)
(CMS) (CMS) Khachatryan, V., ..., Pleština, R., ..., Godinović, N., Lelas, D., Puljak, I., ..., Antunović, Ž. & Kovač, M. (2017) Search for top squark pair production in compressed-mass- spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable. Physics letters. B, 767, 403-430 doi:10.1016/j.physletb.2017.02.007.
@article{article, year = {2017}, pages = {403-430}, DOI = {10.1016/j.physletb.2017.02.007}, keywords = {high energy physics, experimental particle physics, LHC, CMS, standard model}, journal = {Physics letters. B}, doi = {10.1016/j.physletb.2017.02.007}, volume = {767}, issn = {0370-2693}, title = {Search for top squark pair production in compressed-mass- spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable}, keyword = {high energy physics, experimental particle physics, LHC, CMS, standard model} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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