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arXiv 2103.08284hep-ph
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确定$J/ψ\rightarrow μ^- μ^+ X$衰变中亲μ子$X$玻色子自旋宇称的方法

Methodology to determine the spin-parity of muon-philic $X$ boson in $J/ψ\rightarrow μ^- μ^+ X$ decay

Manimala Mitra, Dibyakrupa Sahoo

摘要:

μ子反常磁矩的异常可以用亲μ子的$X$玻色子的存在来解释,这种玻色子可以是质量小于μ子质量两倍的标量粒子或矢量粒子。有趣的是,亲μ子的$X$玻色子也可能不是宇称本征态。如果存在这样的玻色子,不管它的宇称如何,它都可以在$J/ψ\to μ^- μ^+ X$衰变中直接观察到,而$X$仍然是不可见的。我们表明,通过使用角分布或事件的分布在广场Dalitz图,以及两个定义良好的无量纲比,可以清楚地区分各种自旋宇称的可能性。这将构成对这种新物理学可能性的存在和性质的重要探索。

英文摘要:

The present anomaly in muon anaomalous magnetic moment can be explained by the presence of a muon-philic $X$ boson which could be a scalar particle or a vector particle with mass less than twice the mass of muon. The muon-philic $X$ boson could interestingly not be a parity eigenstate as well. If there exists such a boson, irrespective of its parity, it can be directly observed in the decay $J/ψ\to μ^- μ^+ X$ where $X$ remains invisible. We show that by using the angular distribution or the distribution of events in the square Dalitz plot, along with two well defined dimensionless ratios, one can clearly distinguish among the various spin-parity possibilities. This would constitute an important probe of both the existence and the nature of this new physics possibility.

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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