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Pregled bibliografske jedinice broj: 814812

Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method


Khachatryan, Vardan; ...; Morović, Srećko; Ferenček, Dinko; Đurić, Senka; Godinović, Nikola; Lelas, Damir; Polić, Dunja; Puljak, Ivica; Antunović, Željko et al.
Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method // European physical journal C : particles and fields, 75 (2015), 6; 251-1 doi:10.1140/epjc/s10052-015-3454-1 (međunarodna recenzija, članak, znanstveni)


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Naslov
Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method

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

Izvornik
European physical journal C : particles and fields (1434-6044) 75 (2015), 6; 251-1

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

Ključne riječi
High energy physics ; Experimental particle physics ; LHC ; CMS ; Standard Model

Sažetak
A search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks is presented. Events with hadronic jets and one or two oppositely charged leptons are selected from a data sample corresponding to an integrated luminosity of 19.5 inverse femtobarns collected by the CMS experiment at the LHC in pp collisions at a centre-of-mass energy of 8 TeV. In order to separate the signal from the larger t t-bar + jets background, this analysis uses a matrix element method that assigns a probability density value to each reconstructed event under signal or background hypotheses. The ratio between the two values is used in a maximum likelihood fit to extract the signal yield. The results are presented in terms of the measured signal strength modifier, mu, relative to the standard model prediction for a Higgs boson mass of 125 GeV. The observed (expected) exclusion limit at a 95% confidence level is mu < 4.2 (3.3), corresponding to a best fit value mu-hat = 1.2 +1.6 -1.5.

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

Khachatryan, Vardan; ...; Morović, Srećko; Ferenček, Dinko; Đurić, Senka; Godinović, Nikola; Lelas, Damir; Polić, Dunja; Puljak, Ivica; Antunović, Željko et al.
Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method // European physical journal C : particles and fields, 75 (2015), 6; 251-1 doi:10.1140/epjc/s10052-015-3454-1 (međunarodna recenzija, članak, znanstveni)
Khachatryan, V., ..., Morović, S., Ferenček, D., Đurić, S., Godinović, N., Lelas, D., Polić, D., Puljak, I. & Antunović, Ž. (2015) Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method. European physical journal C : particles and fields, 75 (6), 251-1 doi:10.1140/epjc/s10052-015-3454-1.
@article{article, year = {2015}, pages = {251-1-251-28}, DOI = {10.1140/epjc/s10052-015-3454-1}, keywords = {High energy physics, Experimental particle physics, LHC, CMS, Standard Model}, journal = {European physical journal C : particles and fields}, doi = {10.1140/epjc/s10052-015-3454-1}, volume = {75}, number = {6}, issn = {1434-6044}, title = {Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method}, 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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