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arXiv 2603.03250hep-ex
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寻找一个质量在10至70 GeV之间、衰变成光子对的窄共振态,在质子-质子碰撞中于$\sqrt{s}$ = 13 TeV

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH (CERN)(欧洲核子研究中心)

CMS Collaboration

AI总结:

在13 TeV质子-质子碰撞中,利用CMS实验数据寻找质量在10-70 GeV之间、衰变成光子对的窄共振态,并设定了相关截面和分支比的上限。

摘要:

新标量粒子存在性的预测由几种理论模型提出。在LHC上寻找光子对的共振产生能够探测这些模型。我们利用CMS实验的质子-质子碰撞数据集,寻找通过胶子融合产生、衰变成质量在10至70 GeV之间的光子对的窄共振态。该数据集对应于54.4 fb$^{-1}$的积分亮度,于2018年在中心对称能为13 TeV的条件下获取,使用了新引入的双光子触发器,以探索低质量双光子谱。未观察到显著的背景之上过剩。对窄共振态的胶子融合产生截面与双光子衰变分支比的乘积设定了上限。此外,还提供了在有效场论框架下对轴子类粒子的解释。

英文摘要:

The existence of a new spin-zero particle with a mass below the electroweak scale is predicted by several theoretical models. Searches for resonant production of photon pairs at the LHC are able to probe these models. We present a search for a narrow resonance produced through gluon fusion that decays into a pair of photons with an invariant mass between 10 and 70 GeV, using a proton-proton collision data set from the CMS experiment. This data set, corresponding to an integrated luminosity of 54.4 fb$^{-1}$, was recorded in 2018 at a center-of-mass energy of 13 TeV using a newly introduced diphoton trigger that enabled exploration of the low-mass diphoton spectrum. No significant excess above the expected background is observed. Upper limits are set on the product of the gluon fusion production cross section and the branching fraction of the diphoton decay of a narrow resonance. An interpretation of these limits within an effective field theory framework for axion-like particles is also provided.

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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