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Pregled bibliografske jedinice broj: 814817

Search for decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV


Khachatryan, Vardan; ...; Morović, Srećko; Ferenček, Dinko; Đurić, Senka; Godinović, Nikola; Lelas, Damir; Polić, Dunja; Puljak, Ivica; Antunović, Željko et al.
Search for decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV // European physical journal C, 75 (2015), 4; 151-1 doi:10.1140/epjc/s10052-015-3367-z (međunarodna recenzija, članak, znanstveni)


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Naslov
Search for decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV

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 (1434-6044) 75 (2015), 4; 151-1

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 has been performed for long-lived particles that could have come to rest within the CMS detector, using the time intervals between LHC beam crossings. The existence of such particles could be deduced from observation of their decays via energy deposits in the CMS calorimeter appearing at times that are well separated from any proton- proton collisions. Using a data set corresponding to an integrated luminosity of 18.6 inverse femtobarns of 8 TeV proton-proton collisions, and a search interval corresponding to 281 hours of trigger livetime, 10 events are observed, with a background prediction of 13.2 +3.6 -2.5 events. Limits are presented at 95% confidence level on gluino and top squark production, for over 13 orders of magnitude in the mean proper lifetime of the stopped particle. Assuming a cloud model of R-hadron interactions, a gluino with mass < 1000 GeV and a top squark with mass < 525 GeV are excluded, for lifetimes between 1 microsecond and 1000 s. These results are the most stringent constraints on stopped particles to date.

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 decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV // European physical journal C, 75 (2015), 4; 151-1 doi:10.1140/epjc/s10052-015-3367-z (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 decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV. European physical journal C, 75 (4), 151-1 doi:10.1140/epjc/s10052-015-3367-z.
@article{article, year = {2015}, pages = {151-1-151-22}, DOI = {10.1140/epjc/s10052-015-3367-z}, keywords = {High energy physics, Experimental particle physics, LHC, CMS, Standard Model}, journal = {European physical journal C}, doi = {10.1140/epjc/s10052-015-3367-z}, volume = {75}, number = {4}, issn = {1434-6044}, title = {Search for decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV}, 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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