Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV
博士 === 國立臺灣大學 === 物理研究所 === 100 === We present a search for pair-produced vector-like charge 2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV performed by the CMS experiment at the LHC. Events consistent with the flavor changing neutral current decay of a T quark to a top quark an...
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2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/61573727681319251473 |
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ndltd-TW-100NTU051980512015-10-13T21:50:18Z http://ndltd.ncl.edu.tw/handle/61573727681319251473 Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV 在7TeV質心能量的質子對撞機實驗中尋找帶2/3電荷的類向量頂夸克透過頂夸克和Z波色子的事件 Yeng-Ming Tzeng 曾衍銘 博士 國立臺灣大學 物理研究所 100 We present a search for pair-produced vector-like charge 2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV performed by the CMS experiment at the LHC. Events consistent with the flavor changing neutral current decay of a T quark to a top quark and a Z boson are selected by requiring two leptons from the Z decay as well as an additional isolated, charged lepton. With an integrated luminosity of 1.14 /fb, the observed events are found to be consistent with the standard model background prediction. Assuming a branching fraction of 100% for the decay T -> tZ, a T quark with mass less than 475 GeV/c2 is excluded at a 95% confidence level. 張寶棣 2012 學位論文 ; thesis 96 en_US |
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博士 === 國立臺灣大學 === 物理研究所 === 100 === We present a search for pair-produced vector-like charge 2/3 quarks, T, in pp collisions at a center-of-mass energy of 7 TeV performed by the CMS experiment at the LHC. Events consistent with the flavor changing neutral current decay of a T quark to a top quark and a Z boson are selected by requiring two leptons from the Z decay as well as an additional isolated, charged lepton. With an integrated luminosity of 1.14 /fb, the observed events are found to be consistent with the standard model background prediction. Assuming a branching fraction of 100% for the decay T -> tZ, a T quark with mass less than 475 GeV/c2 is excluded at a 95% confidence level.
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張寶棣 |
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張寶棣 Yeng-Ming Tzeng 曾衍銘 |
| author |
Yeng-Ming Tzeng 曾衍銘 |
| spellingShingle |
Yeng-Ming Tzeng 曾衍銘 Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV |
| author_sort |
Yeng-Ming Tzeng |
| title |
Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV |
| title_short |
Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV |
| title_full |
Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV |
| title_fullStr |
Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV |
| title_full_unstemmed |
Search for a Vector-like Quark with Charge 2=3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV |
| title_sort |
search for a vector-like quark with charge 2=3 in t + z events from pp collisions at sqrt(s) = 7 tev |
| publishDate |
2012 |
| url |
http://ndltd.ncl.edu.tw/handle/61573727681319251473 |
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