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The first direct limit on the t quar...

Harvard University.

The first direct limit on the t quark lifetime.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The first direct limit on the t quark lifetime.
作者:	Holloway, Ayana Tamu.
面頁冊數:	216 p.
附註:	Adviser: M. E. B. Franklin.
附註:	Source: Dissertation Abstracts International, Volume: 67-05, Section: B, page: 2624.
Contained By:	Dissertation Abstracts International67-05B.
標題:	Physics, Elementary Particles and High Energy.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217760
ISBN:	9780542692772

The first direct limit on the t quark lifetime.
Holloway, Ayana Tamu.

The first direct limit on the t quark lifetime. - 216 p.

Adviser: M. E. B. Franklin.

Thesis (Ph.D.)--Harvard University, 2006.

This dissertation presents the first direct limit on the t quark lifetime, measured in tt¯ pair production candidate events from a 318 pb-1 sample of p + p¯ collisions recorded by the Collider Detector at Fermilab (CDF). Candidate events are identified by a leptonically decaying W+/- boson and three or more jets, at least one of which contains a secondary vertex. In each event we measure the transverse track-to-beam displacement (impact parameter) of the lepton from the W+/- decay, and compare the distribution to templates constructed from tt¯ event simulations with a variable t lifetime. Anticipated background distributions are measured with a combination of Monte Carlo event simulation and control samples, and included in the templates.

ISBN: 9780542692772Subjects--Topical Terms:

227490
Physics, Elementary Particles and High Energy.

The first direct limit on the t quark lifetime.
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502 $a Thesis (Ph.D.)--Harvard University, 2006.
520 # $a This dissertation presents the first direct limit on the t quark lifetime, measured in tt¯ pair production candidate events from a 318 pb-1 sample of p + p¯ collisions recorded by the Collider Detector at Fermilab (CDF). Candidate events are identified by a leptonically decaying W+/- boson and three or more jets, at least one of which contains a secondary vertex. In each event we measure the transverse track-to-beam displacement (impact parameter) of the lepton from the W+/- decay, and compare the distribution to templates constructed from tt¯ event simulations with a variable t lifetime. Anticipated background distributions are measured with a combination of Monte Carlo event simulation and control samples, and included in the templates.
520 # $a We determine the following limits: ctt<52.5mm 95&percnt;C.L. ctt<43.5mm 90&percnt;C.L.
520 # $a We thus conclude that the top mean lifetime is less than 145 fs (175 fs) at 90% (95%) C.L.
590 $a School code: 0084.
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