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题名: Probing CP violation in h -> gamma gamma with converted photons
作者: Bishara, F;  Grossman, Y;  Harnik, R;  Robinson, DJ;  Shu, J;  Zupan, J
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2014
期号: 4, 页码:84
关键词: MODEL HIGGS-BOSON ;  TOP-QUARK ;  PAIR PRODUCTION ;  DECAY MODE ;  MASS ;  TAU ;  PARITY ;  LHC ;  TAUBARTAU ;  EVENTS
学科分类: Physics
DOI: 10.1007/JHEP04(2014)084
通讯作者: Bishara, F (reprint author), Univ Cincinnati, Dept Phys, 345 Clifton Ct, Cincinnati, OH 45221 USA.
部门归属: [Bishara, Fady
英文摘要: We study Higgs diphoton decays, in which both photons undergo nuclear conversion to electron-positron pairs. The kinematic distribution of the two electron-positron pairs may be used to probe the CP violating (CPV) coupling of the Higgs to photons, that may be produced by new physics. Detecting CPV in this manner requires interference between the spin-polarized helicity amplitudes for both conversions. We derive leading order, analytic forms for these amplitudes. In turn, we obtain compact, leading-order expressions for the full process rate. While performing experiments involving photon conversions may be challenging, we use the results of our analysis to construct experimental cuts on certain observables that may enhance sensitivity to CPV. We show that there exist regions of phase space on which sensitivity to CPV is of order unity. The statistical sensitivity of these cuts are verified numerically, using dedicated Monte-Carlo simulations.
资助者: Fermilab Fellowship in Theoretical Physics; U.S. National Science Foundation [PHY-0757868, PHY-1002399, PHY-1151392]; United States-Israel Binational Science Foundation (BSF) [2010221]; National Science Foundation [NSF PHY11-25915]; Fermi Research Alliance, LLC [De-AC02-07CH11359]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000334502000003
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15785
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Recommended Citation:
Bishara, F,Grossman, Y,Harnik, R,et al. Probing CP violation in h -> gamma gamma with converted photons[J]. JOURNAL OF HIGH ENERGY PHYSICS,2014(4):84.
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