Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons
Citable URI:
http://hdl.handle.net/1721.1/74646
| Title: | Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons |
| Author: | Aad, G.; Abbott, B.; Abdallah, J.; Abdelalim, A.; Abdesselam, A.; Abdinov, O.; Abi, B.; Abolins, M.; AbouZeid, O.; Abramowicz, H.; Abreu, H.; Acerbi, E.; Acharya, B.; Adamczyk, L.; Adams, D.; Addy, T.; Adelman, J.; Aderholz, M.; Adomeit, S.; Adragna, P.; Adye, T.; Aefsky, S.; Aguilar-Saavedra, J.; Aharrouche, M.; Ahlen, S.; Ahles, F.; Ahmad, A.; Ahsan, M.; Aielli, G.; Akdogan, T. ... [more in full view] |
| Department: | Massachusetts Institute of Technology. Dept. of Physics |
| Publisher: | American Physical Society |
| Issue Date: | 2012-07 |
| Abstract: | This Letter presents a search for pair production of heavy down-type quarks decaying via b′→Wt in the lepton+jets channel, as b′b̅ ′→W[superscript -]tW[superscript +]t̅ →bb̅ W[superscript +]W[superscript -]W[superscript +]W[superscript -]→l[superscript ±]νbb̅ qq̅ qq̅ qq̅ . In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04 fb[superscript -1] from pp collisions at √s=7 TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480 GeV can be excluded at the 95% confidence level. |
| URI: | http://hdl.handle.net/1721.1/74646 |
| ISSN: | 0031-9007 1079-7114 |
| Citation: | G. Aad et al. “Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons.” Physical Review Letters 109 (2012). |
| Version: | Final published version |
| Terms of Use: | Creative Commons Attribution 3.0 |
| Detailed Terms: | http://creativecommons.org/licenses/by/3.0/ |
| Published as: | http://dx.doi.org/10.1103/PhysRevLett.109.032001 |
| Journal: | Physical Review Letters |
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