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Beyond the Standard Model: The pragm...

Mahbubani, Rakhi.

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Beyond the Standard Model: The pragmatic approach to the gauge hierarchy problem.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Beyond the Standard Model: The pragmatic approach to the gauge hierarchy problem./
作者:	Mahbubani, Rakhi.
面頁冊數:	94 p.
附註:	Adviser: Nima Arkani-Hamed.
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=3217817
ISBN:	9780542693342

Beyond the Standard Model: The pragmatic approach to the gauge hierarchy problem.
Mahbubani, Rakhi.

Beyond the Standard Model: The pragmatic approach to the gauge hierarchy problem. - 94 p.

Adviser: Nima Arkani-Hamed.

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

The current favorite solution to the gauge hierarchy problem, the Minimal Supersymmetric Standard Model (MSSM), is looking increasingly fine tuned as recent results from LEP-II have pushed it to regions of its parameter space where a light higgs seems unnatural. Given this fact it seems sensible to explore other approaches to this problem; we study three alternatives here.

ISBN: 9780542693342Subjects--Topical Terms:

1019488
Physics, Elementary Particles and High Energy.

Beyond the Standard Model: The pragmatic approach to the gauge hierarchy problem.
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245 1 0 $a Beyond the Standard Model: The pragmatic approach to the gauge hierarchy problem.
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502 $a Thesis (Ph.D.)--Harvard University, 2006.
520 $a The current favorite solution to the gauge hierarchy problem, the Minimal Supersymmetric Standard Model (MSSM), is looking increasingly fine tuned as recent results from LEP-II have pushed it to regions of its parameter space where a light higgs seems unnatural. Given this fact it seems sensible to explore other approaches to this problem; we study three alternatives here.
520 $a The first is a Little Higgs theory, in which the Higgs particle is realized as the pseudo-Goldstone boson of an approximate global chiral symmetry and so is naturally light. We analyze precision electroweak observables in the Minimal Moose model, one example of such a theory, and look for regions in its parameter space that are consistent with current limits on these.
520 $a It is also possible to find a solution within a supersymmetric framework by adding to the MSSM superpotential a lambdaSHuH d term and UV completing with new strong dynamics under which S is a composite before lambda becomes non-perturbative. This allows us to increase the MSSM tree level higgs mass bound to a value that alleviates the supersymmetric fine-tuning problem with elementary higgs fields, maintaining gauge coupling unification in a natural way.
520 $a Finally we try an entirely different tack, in which we do not attempt to solve the hierarchy problem, but rather assume that the tuning of the higgs can be explained in some unnatural way, from environmental considerations for instance. With this philosophy in mind we study in detail the low-energy phenomenology of the minimal extension to the Standard Model with a dark matter candidate and gauge coupling unification, consisting of additional fermions with the quantum numbers of SUSY higgsinos, and a singlet.
590 $a School code: 0084.
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710 2 $a Harvard University. $3 528741
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791 $a Ph.D.
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