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喷射相关共振光谱学。

Jet-associated resonance spectroscopy.

作者信息

Englert Christoph, Ferretti Gabriele, Spannowsky Michael

机构信息

1SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK.

2Department of Physics, Chalmers University of Technology, Fysikgården, 41296 Göteborg, Sweden.

出版信息

Eur Phys J C Part Fields. 2017;77(12):842. doi: 10.1140/epjc/s10052-017-5416-2. Epub 2017 Dec 7.

DOI:10.1140/epjc/s10052-017-5416-2
PMID:31997937
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6956872/
Abstract

We present a model-independent study aimed at characterising the nature of possible resonances in the jet-photon or jet- final state at hadron colliders. Such resonances are expected in many models of compositeness and would be a clear indication of new physics. At leading order, in the narrow width approximation, the matrix elements are parameterised by just a few constants describing the coupling of the various helicities to the resonance. We present the full structure of such amplitudes up to spin 2 and use them to simulate relevant kinematic distributions that could serve to constrain the coupling structure. This also generalises the signal generation strategy that is currently pursued by ATLAS and CMS to the most general case in the considered channels. While the determination of the P/CP properties of the interaction seems to be out of reach within this framework, there is a wealth of information to be gained about the spin of the resonance and the relative couplings of the helicities.

摘要

我们开展了一项与模型无关的研究，旨在刻画强子对撞机中喷注-光子或喷注末态可能存在的共振的性质。在许多复合模型中都预期会出现此类共振，这将是新物理的明确迹象。在窄宽度近似下的领头阶，矩阵元仅由几个描述各种螺旋度与共振耦合的常数来参数化。我们给出了直至自旋2的此类振幅的完整结构，并利用它们来模拟可用于约束耦合结构的相关运动学分布。这也将目前ATLAS和CMS所采用的信号产生策略推广到了所考虑通道中的最一般情形。虽然在此框架内似乎无法确定相互作用的P/CP性质，但关于共振的自旋以及螺旋度的相对耦合仍有大量信息可获取。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/cd39bfa966d7/10052_2017_5416_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/64ad8fb8e623/10052_2017_5416_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/a4cfb81dc9d8/10052_2017_5416_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/7762e335cc6a/10052_2017_5416_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/a8ed8204a074/10052_2017_5416_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/219a3f93438c/10052_2017_5416_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/bd794cff36ad/10052_2017_5416_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/ba58de245c55/10052_2017_5416_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/1a58dda711fa/10052_2017_5416_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/cd39bfa966d7/10052_2017_5416_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/64ad8fb8e623/10052_2017_5416_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/a4cfb81dc9d8/10052_2017_5416_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/7762e335cc6a/10052_2017_5416_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/a8ed8204a074/10052_2017_5416_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/219a3f93438c/10052_2017_5416_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/bd794cff36ad/10052_2017_5416_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/ba58de245c55/10052_2017_5416_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/1a58dda711fa/10052_2017_5416_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c85/6956872/cd39bfa966d7/10052_2017_5416_Fig9_HTML.jpg

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本文引用的文献

1
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2
Determining the structure of Higgs couplings at the CERN LargeHadron Collider.在欧洲核子研究中心大型强子对撞机上确定希格斯玻色子耦合的结构。
Phys Rev Lett. 2002 Feb 4;88(5):051801. doi: 10.1103/PhysRevLett.88.051801. Epub 2002 Jan 22.
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Excited-quark and -lepton production at hadron colliders.
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Phys Rev D Part Fields. 1990 Aug 1;42(3):815-824. doi: 10.1103/physrevd.42.815.
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Correlation between decay planes in Higgs-boson decays into a W pair (into a Z pair).希格斯玻色子衰变成一对W玻色子（衰变成一对Z玻色子）时衰变平面之间的相关性。
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P or CP determination by sequential decays: V1V2 modes with decays into l-barAlB and/or q-barAqB.通过连续衰变确定P或CP：衰变成l-barAlB和/或q-barAqB的V1V2模式。
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