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Search for third-generation scalar leptoquarks in the t tau channel in proton-proton collisions at root s=8 TeV

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2015
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Authors
Khachatryan, V.
Adžić, Petar
Ekmedzic, M.
Milošević, Jovan
Rekovic, V.
Đorđević, Miloš
Milenović, Predrag
CMS Collaboration (ukupan broj autora: 2283)
Article
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Abstract
A search for pair production of third-generation scalar leptoquarks decaying to top quark and tau lepton pairs is presented using proton-proton collision data at a center-of-mass energy of root s=8TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb(-1). The search is performed using events that contain an electron or a muon, a hadronically decaying tau lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a tau lepton, the existence of pair produced, charge -1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a tau lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling lambda(333) .
Keywords:
Hadron-Hadron Scattering / Beyond Standard Model
Source:
Journal of High Energy Physics, 2015, 7
Projects:
  • BMWFW (Austria), FWF (Austria), FNRS (Belgium), FWO (Belgium), CNPq (Brazil), CAPES (Brazil), FAPERJ (Brazil), FAPESP (Brazil), MES (Bulgaria), CERN, CAS (China), MoST (China), NSFC (China), COLCIENCIAS (Colombia), MSES (Croatia), CSF (Croatia), RPF (Cyprus), MoER (Estonia), ERC IUT (Estonia), ERDF (Estonia), Academy of Finland, MEC (Finland), HIP (Finland), CEA (France), CNRS/IN2P3 (France), BMBF, Germany, DFG (Germany), HGF (Germany), GSRT (Greece), OTKA (Hungary), NIH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), MSIP (Republic of Korea), NRF (Republic of Korea), LAS (Lithuania), MOE (Malaysia), UM (Malaysia), CINVESTAV (Mexico), CONACYT (Mexico), SEP (Mexico), UASLP-FAI (Mexico), MBIE (New Zealand), PAEC (Pakistan), MSHE (Poland), NSC (Poland), FCT (Portugal), JINR (Dubna), MON (Russia), RosAtom (Russia), RAS (Russia), RFBR (Russia), MESTD (Serbia), SEIDI (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), MST (Taipei), ThEPCenter (Thailand), IPST (Thailand), STAR (Thailand), NSTDA (Thailand), TUBITAK (Turkey), TAEK (Turkey), NASU (Ukraine), SFFR (Ukraine), STFC (United Kingdom), DOE (U.S.A.), NSF (U.S.A.), Marie-Curie program (European Union), European Research Council (European Union), EPLANET (European Union), Leventis Foundation, A.P. Sloan Foundation, Alexander von Humboldt Foundation, Belgian Federal Science Policy Office, Fonds pour la Formation a la Recherche dans lIndustrie et dans lAgriculture (FRIA-Belgium), Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium), Ministry of Education, Youth and Sports (MEYS) of the Czech Republic, Council of Science and Industrial Research, India, HOMING PLUS program of the Foundation for Polish Science, European Union, Regional Development Fund, Compagnia di San Paolo (Torino), Consorzio per la Fisica (Trieste), MIUR project (Italy) [20108T4XTM], Thalis program - EU-ESF, Aristeia program - EU-ESF, Greek NSRF, National Priorities Research Program by Qatar National Research Fund

DOI: 10.1007/JHEP07(2015)042

ISSN: 1029-8479

WoS: 000357931600001

Scopus: 2-s2.0-84938844501
[ Google Scholar ]
29
18
URI
http://vinar.vin.bg.ac.rs/handle/123456789/655
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Institution
Vinča
TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ekmedzic, M.
AU  - Milošević, Jovan
AU  - Rekovic, V.
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/655
AB  - A search for pair production of third-generation scalar leptoquarks decaying to top quark and tau lepton pairs is presented using proton-proton collision data at a center-of-mass energy of root s=8TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb(-1). The search is performed using events that contain an electron or a muon, a hadronically decaying tau lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a tau lepton, the existence of pair produced, charge -1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a tau lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling lambda(333) .
T2  - Journal of High Energy Physics
T1  - Search for third-generation scalar leptoquarks in the t tau channel in proton-proton collisions at root s=8 TeV
IS  - 7
DO  - 10.1007/JHEP07(2015)042
ER  - 
@article{
author = "Khachatryan, V. and Adžić, Petar and Ekmedzic, M. and Milošević, Jovan and Rekovic, V. and Đorđević, Miloš and Milenović, Predrag",
year = "2015",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/655",
abstract = "A search for pair production of third-generation scalar leptoquarks decaying to top quark and tau lepton pairs is presented using proton-proton collision data at a center-of-mass energy of root s=8TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb(-1). The search is performed using events that contain an electron or a muon, a hadronically decaying tau lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a tau lepton, the existence of pair produced, charge -1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a tau lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling lambda(333) .",
journal = "Journal of High Energy Physics",
title = "Search for third-generation scalar leptoquarks in the t tau channel in proton-proton collisions at root s=8 TeV",
number = "7",
doi = "10.1007/JHEP07(2015)042"
}
Khachatryan V, Adžić P, Ekmedzic M, Milošević J, Rekovic V, Đorđević M, Milenović P. Search for third-generation scalar leptoquarks in the t tau channel in proton-proton collisions at root s=8 TeV. Journal of High Energy Physics. 2015;(7)
Khachatryan, V., Adžić, P., Ekmedzic, M., Milošević, J., Rekovic, V., Đorđević, M.,& Milenović, P. (2015). Search for third-generation scalar leptoquarks in the t tau channel in proton-proton collisions at root s=8 TeV.
Journal of High Energy Physics(7).
https://doi.org/10.1007/JHEP07(2015)042
Khachatryan V., Adžić Petar, Ekmedzic M., Milošević Jovan, Rekovic V., Đorđević Miloš, Milenović Predrag, "Search for third-generation scalar leptoquarks in the t tau channel in proton-proton collisions at root s=8 TeV", no. 7 (2015),
https://doi.org/10.1007/JHEP07(2015)042 .

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