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研究生:李露雲
研究生(外文):Lu-Yun Lee
論文名稱:穿越天際的超對稱
論文名稱(外文):SUSY ACROSS THE SKY
指導教授:張敬民
指導教授(外文):Kingman Cheung
學位類別:碩士
校院名稱:國立清華大學
系所名稱:物理學系
學門:自然科學學門
學類:物理學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:英文
論文頁數:42
中文關鍵詞:超對稱
外文關鍵詞:SUSY
相關次數:
  • 被引用被引用:0
  • 點閱點閱:160
  • 評分評分:
  • 下載下載:5
  • 收藏至我的研究室書目清單書目收藏:0
在GMSB模型中,第二輕的超對稱粒子neutrilino會衰變成光子和gravitino。當neutrilino的衰變長度大於實驗設備時,一般的對撞機實驗及無法分辨GMSB模型與一般超重力模型的預測結果。在這裡,我們提出了一種新方法去偵測此種常衰變長度的neutrilino。當高能量的宇宙線與大氣層中的粒子發生碰撞時,將產生超對稱粒子。這些超對稱粒子將衰變成neutrilino。上述的neutrilino在大氣成中經歷了一段距離後將衰變成光子和gravitino。我們預期使用地表上的偵測器可以幫助偵測到這些光子。這個方法可以偵測到的超對稱破壞尺度介於10^4~10^6 GeV 之間。光子產生率的數量級約10^(-4) 每平方公里每年每單位立體角。
In gauge-mediated models, the next-to-lightest supersymmetric particle (NLSP), may travel
a long distance before decaying into a gravitino and a photon. The collider experiment is not
able to distinguish such a scenario from the usual supergravity models when the decay time of the
NLSP is long enough. Here we propose a new method to detect such a long decay of the NLSP.
The high energy cosmic rays hitting the atmosphere will produce a lot of SUSY particles, which
decay promptly into the NLSP. The can travel a distance of the order of the atmosphere and
decays into a photon and a gravitino. We suggest to use the ground-based arrays of telescopes to
detect the photon. This method can probe a SUSY breaking scale sqrt(<F>) ~ 10^4~10^6 GeV. The event
rate could be as high as O(10^(-4)) per km^2 per year per sr.
I. Introduction 1
II. The Minimal SuperSymmetric Standard Model(MSSM) 3
A. Fundamental Structure 3
B. Soft SUSY-Breaking terms 6
C. R-Parity 8
1. Consequences of R-parity conservation 9
D. Electroweak Symmetry Breaking and the Higgs Bosons 10
1. Neutralinos 11
III. Gauge-Mediated SUSY Breaking(GMSB) Models 13
A. General considerations for supersymmetry breaking 13
B. The basic idea and main results of GMSB 14
C. Phenomenology 17
IV. Cosmic Rays as Particle Colliders 19
A. Cosmic Rays Spectrum 19
B. Photon °ux decayed by Neutralino 20
C. Ground-Based ° Rays Telescopes 25
1. IACT-type Arrays 26
2. AUGER 28
V. Conclusion 30
A. Table of Supermultiplets for MSSM 31
B. Brief Summary of Feynman Rules and Cross-sections predicted by MSSM32
1. Feynman Rules 32
2. Cross-sections 36
References 41
[1] "A Supersymmetry Primer" , Stephen P. Martin, [hep-ph/9709356].
[2] "Perspectives on Supersymmetry" , G.L.Kane (ed.), Singapore, World Scienti¯c (1998)
[3] "TASI lectures on weak scale supersymmetry: A Top motivated bottom up approach." ,
G.L.Kane, [hep-ph/0202185].
[4] "Theories with Gauge-Mediated Supersymmetry Breaking" , G.F. Giudice, R. Rattazzi, Phys.
Rep. 322 (1999) 419, [hep-ph/9801271].
[5] "Search for supersymmetry with a light gravitino at the Fermilab Tevatron and CERN LEP
colliders" , S. Ambrosnaio, G.L. Kane, G.D. Kribs, S.P. Martin, S. Mrenna, Phys. Rev. D 54
(1996) 5395, [hep-ph/9605398].
[6] "Bounds on Charged, Stable Superpartners from Cosmic Ray Production" , Mark Byrne,
Christopher Kolda and Peter Regan, Phys. Rev. D 66 (2002) 075007, [hep-ph/0202252].
[7] "Cosmic Rays and Pariticle Physics" , Thomas K. Gaisser, Cambridge University Press (1990)
[8] S. Eidelman et al., Physics Letters B592, 1 (2004)
[9] "Squark and Gluino Production at Hadron Colliders" , W.Beenakker, R. HÄopker, M. Spira
and P. M. Zerwas, Nucl. Phys. B 492: 51-103 (1997), [hep-ph/9610490].
[10] "The serch for Supersymmetry: Probing Physics beyond the Standard Model" , Howard E.
Haber, G.L. Kane, Phys. Rep. 117 (1985) 75.
[11] "Stereo array of 30m imaging atmospheric Cerenkov telescopes: A Next-generation detector
for ground-based high energy gamma-ray astronomy" , A. Konopelko, Astroparticle Physics
24 (2005) 191-207, [astro-ph/0506465].
[12] "Status of the HESS experiment" , Ullrich Schwanke, [astro-ph/0307287].
[13] "VERITAS: The Very energetic radiation imaging telescope array system" , T.C. Weekes et
al., Astroparticle Physics 17 (2002) 221-243, [astro-ph/0108478].
[14] "Revealing the Dark TeV Sky: The Atmospheric Cherenkov Imaging Technique for Very High
Energy Gamma-ray Astronomy" , Trevor C. Weekes, [astro-ph/0606130].
[15] "Particle dark matter: evidence, candidates and constraints" , Gianfranco Bertone, Dan
Hooper, Joseph Silk, Phys. Rep. 405 (2005) 279
[16] "Pierre Auger Project Design Report", Fermilab 1997, available at
http://www.auger.org/admin/DesignReport
[17] "Pierre Auger Observatory: Fluorescence Detector Event Reconstruction and Data Anal-
ysis" , D. D'Urso (Catania U.), 2005, Ph.D. Thesis (Advisor: A. Insolia). available at
http://www.slac.stanford.edu/spires/hep/
[18] "New Generation of Parton Distributions with Uncertainties from Global QCD Analysis" , J.
Pumplin, D.R. Stump, J.Huston, H.L. Lai, P. Nadolsky, W.K. Tung , JHEP 0207:012(2002),
[hep-ph/0201195].
[19] "Inclusive Jet Production, Parton Distributions, and the Search for New Physics" , D. Stump,
J. Huston, J. Pumplin, W.K. Tung, H.L. Lai, S. Kuhlmann, J. Owens , JHEP 0310:046(2003),
[hep-ph/0303013].
[20] "Neutrino dimuon Production and Strangeness Asymmetry of the Nucleon" , F. Olness, J.
Pumplin, S. Stump, J. Huston, P. Nadolsky, H.L. Lai, S. Kretzer, J.F. Owens, W.K. Tung ,
to appear in Eur.Phys.J.C., [hep-ph/0312323].
[21] "CTEQ6 Parton Distributions with Heavy Quark Mass E®ects" , S. Kretzer, H.L. Lai, F.
Olness, W.K. Tung , Phys. Rev. D69:114005(2004), [hep-ph/0307022].
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