Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state
2012
Аутори
Chatrchyan, S.Adžić, Petar
Đorđević, Miloš
Ekmedžić, Marko
Krpić, D.
Milošević, Jovan
Milenović, Predrag
Reković, Vladimir
CMS Collaboration (ukupan broj autora: 2213)
Чланак у часопису
Метаподаци
Приказ свих података о документуАпстракт
A search is presented for a massive particle, generically referred to as a Z, decaying into a t (t) over bar pair. The search focuses on Z resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7TeV, corresponding to an integrated luminosity of 5 fb(-1). Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in t (t) over bar production beyond expectations of the standard mode for tt invariant mass larger than 1TeV/c(2).
Кључне речи:
Hadron-Hadron ScatteringИзвор:
Journal of High Energy Physics, 2012, 9Финансирање / пројекти:
- FMSR (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), RPF (Cyprus), MoER [SF0690030s09], ERDF (Estonia), Academy of Finland, MEC, (Finland), HIP (Finland), CEA (France), CNRS/IN2P3 (France), BMBF, Germany, DFG, (Germany), HGF (Germany), GSRT (Greece), OTKA (Hungary), NKTH (Hungary), DAE (India), DST (India), IPM (Iran), SFI (Ireland), INFN (Italy), NRF (Korea), WCU (Korea), LAS (Lithuania), CINVESTAV, (Mexico), CONACYT, (Mexico), SEP, (Mexico), UASLP-FAI (Mexico), MSI (New Zealand), PAEC (Pakistan), MSHE (Poland), NSC (Poland), FCT (Portugal), JINR (Armenia), JINR (Belarus), JINR (Georgia), JINR (Ukraine), JINR (Uzbekistan), MON (Russia), RosAtom (Russia), RAS (Russia), RFBR (Russia), MSTD (Serbia), MICINN (Spain), CPAN (Spain), Swiss Funding Agencies (Switzerland), NSC (Taipei), TUBITAK (Turkey), STFC (United Kingdom), DOE (U.S.A.), NSF (U.S.A.), DOE under Task TeV [DE-FG02-96ER40956]
DOI: 10.1007/JHEP09(2012)029
ISSN: 1029-8479
WoS: 000310341300042
Scopus: 2-s2.0-84867010735
Колекције
Институција/група
VinčaTY - JOUR AU - Chatrchyan, S. AU - Adžić, Petar AU - Đorđević, Miloš AU - Ekmedžić, Marko AU - Krpić, D. AU - Milošević, Jovan AU - Milenović, Predrag AU - Reković, Vladimir PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5124 AB - A search is presented for a massive particle, generically referred to as a Z, decaying into a t (t) over bar pair. The search focuses on Z resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7TeV, corresponding to an integrated luminosity of 5 fb(-1). Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in t (t) over bar production beyond expectations of the standard mode for tt invariant mass larger than 1TeV/c(2). T2 - Journal of High Energy Physics T1 - Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state IS - 9 DO - 10.1007/JHEP09(2012)029 ER -
@article{ author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Krpić, D. and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir", year = "2012", abstract = "A search is presented for a massive particle, generically referred to as a Z, decaying into a t (t) over bar pair. The search focuses on Z resonances that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that are partially or fully merged into single jets. The analysis uses new methods to analyze jet substructure, providing suppression of the non-top multijet backgrounds. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 7TeV, corresponding to an integrated luminosity of 5 fb(-1). Upper limits in the range of 1 pb are set on the product of the production cross section and branching fraction for a topcolor Z modeled for several widths, as well as for a Randall-Sundrum Kaluza-Klein gluon. In addition, the result contrain any enhancement in t (t) over bar production beyond expectations of the standard mode for tt invariant mass larger than 1TeV/c(2).", journal = "Journal of High Energy Physics", title = "Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state", number = "9", doi = "10.1007/JHEP09(2012)029" }
Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Krpić, D., Milošević, J., Milenović, P.,& Reković, V.. (2012). Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state. in Journal of High Energy Physics(9). https://doi.org/10.1007/JHEP09(2012)029
Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Krpić D, Milošević J, Milenović P, Reković V. Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state. in Journal of High Energy Physics. 2012;(9). doi:10.1007/JHEP09(2012)029 .
Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Krpić, D., Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Search for anomalous t(t)over-bar production in the highly-boosted all-hadronic final state" in Journal of High Energy Physics, no. 9 (2012), https://doi.org/10.1007/JHEP09(2012)029 . .