arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.08971hep-exhep-phnucl-exnucl-th
收藏

类轴子粒子的对撞机约束

Collider constraints on axion-like particles

David d'Enterria

摘要:

综述了在对撞机上寻找类轴子粒子(ALP)的现状和前景,主要集中在欧洲核子研究中心(CERN)大型强子对撞机上。在大型强子对撞机上,通过寻找二光子、三光子和四光子终态中的新$a\toγγ$共振,已经对质量超过几个GeV的耦合到光子以及Z玻色子或希格斯玻色子的ALP进行了限制。分析了质子-质子和铅-铅碰撞中的包容和排斥双光子pp,PbPb $\to a \to γγ(+X)$,以及奇异Z和Higgs玻色子衰变pp $\to \mathrm{Z},\mathrm{H}\to aγ\to 3γ$和pp $\to \mathrm{H}\to aa \to 4γ$.排他搜索PbPb碰撞提供了最好的排除限制ALP群众$m_a\approx 5-$ 100 GeV,而其他渠道是最有竞争力的$m_a\approx 100$ GeV $-$ 2.6 TeV。在95%的置信水平下,排除了高达$\sim$ 100 nb的集成ALP生产截面,对应于在宽质量范围内对低至$g_{aγ}\approx$ 0.05 TeV $^{-1}$的轴子-光子耦合的约束。预计在未来十年,在LHC接近$g_{aγ}\approx 10^{-3}$ TeV $^{-1}$时,$-$ 100的这些限制将比$m_a\approx 1$ GeV $-$ 5 TeV提高10倍。

英文摘要:

The current status and future prospects of searches for axion-like particles (ALPs) at colliders, mostly focused on the CERN LHC, are summarized. Constraints on ALPs with masses above a few GeV that couple to photons, as well as to Z or Higgs bosons, have been set at the LHC through searches for new $a\toγγ$ resonances in di-, tri-, and four-photon final states. Inclusive and exclusive diphotons in proton-proton and lead-lead collisions, pp, PbPb $\to a \to γγ(+X)$, as well as exotic Z and Higgs boson decays, pp $\to \mathrm{Z},\mathrm{H}\to aγ\to 3γ$ and pp $\to \mathrm{H}\to aa \to 4γ$, have been analyzed. Exclusive searches in PbPb collisions provide the best exclusion limits for ALP masses $m_a\approx 5-$100 GeV, whereas the other channels are the most competitive ones over $m_a\approx 100$ GeV$-$2.6 TeV. Integrated ALP production cross sections up to $\sim$100 nb are excluded at 95% confidence level, corresponding to constraints on axion-photon couplings down to $g_{aγ}\approx$ 0.05 TeV$^{-1}$, over broad mass ranges. Factors of 10$-$100 improvements in these limits are expected at the LHC approaching $g_{aγ}\approx 10^{-3}$ TeV$^{-1}$ over $m_a\approx 1$ GeV$-$5 TeV in the next decade.

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。

↑