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arXiv 0707.0797hep-ph
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在LHC上希格斯玻色子加光子的产生:一个b夸克部分子密度的干净探测器

Higgs boson plus photon production at the LHC: a clean probe of the b-quark parton densities

Emidio Gabrielli, Barbara Mele, Johan Rathsman

摘要:

在MSSM模型的框架下,分析了在CERN大型强子对撞机上与高pT光子相关的希格斯玻色子的产生。在唯一的希格斯玻色子末态中要求一个额外的光子,在可能的初始部分子态中选择b-夸克对,因为胶子-胶子初始态不被C-宇称守恒所允许。因此,测量中性希格斯玻色子加上光子产生的截面可以提供一个干净的探测质子中的b夸克密度以及b夸克汤川耦合。b夸克电磁耦合对产生率的抑制可以通过增强的希格斯玻色子玻色子汤川耦合到大tan(β)区域的b来补偿。考虑了希格斯玻色子衰变为τ轻子对的情况,并计算了具有相应信号意义的不可约背景。

英文摘要:

Higgs boson production in association with a high pT photon at the CERN Large Hadron Collider is analyzed, in the framework of the MSSM model, for the heavier neutral Higgs bosons. The request of an additional photon in the exclusive Higgs boson final state selects b-quark pairs among the possible initial partonic states, since gluon-gluon initial states are not allowed by C-parity conservation. Hence, the measurement of cross sections for neutral Higgs boson plus photon production can provide a clean probe of the b-quark density in the proton as well as of the b-quark Yukawa coupling. The suppression of the production rates by the b-quark electromagnetic coupling can be compensated by the enhanced Higgs boson Yukawa coupling to b's in the large tan(beta) regime. The Higgs boson decay into a tau-lepton pair is considered, and irreducible backgrounds with corresponding signal significances are evaluated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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