Shakirov, V.A. Time evolution of energy and spin state distribution of (pµ) 1s atoms. Hyperfine Interact 101, 141–149 (1996). https://doi.org/10.1007/BF02227615. Download citation. Issue Date: December 1996. DOI: https://doi.org/10.1007/BF02227615

Strong solid state effects in low energy scattering of pµ atoms in solid hydrogen are reported and analyzed. Such effects have been observed in TRIUMF experiment E742 where muons are stopped in thin frozen (3 K) layers of hydrogen.

The rare hyperon decay Σ+ → pµ+µ− gained much attention in 2005 when the HyperCP Collaboration at Fermilab reported the first evidence for this mode consisting of three events with the same dimuon invariant mass M µµ = 214.3 MeV [1].

证实标量场的四动量Pµ在洛伦兹变换按P′µ (t′) = ΛµνPν (t) 变换，即Pµ (t)是一个四矢量?

Using four-momentum algebra we can do this in one line, you bring the four-momentum of the particle you want to eliminate to one side of the equation. In this case we want to eliminate the four-momentum of the neutrino, so write down the following four-momentum conservation equation: Pν =Pπ −Pμ P ν = P π − P μ.

Two experiments with low-energy muons are described: the determination of the stopping power of C, Si, Ti and Au for muons at energies down to 2 keV and the measurement of the diffusion times for pµ and dµ atoms in low-pressure (0.25–12 hPa) hydrogen gas.

Using (10 087±44)×106 J/ψ events collected with the BESIII detector, the radiative hyperon decay Σ+→pγ is studied at an electron-positron collider experiment for the first time. The absolute...

Download scientific diagram | The efficiency weights for Λ + c → pµ + µ − as a function of the dimuon invariant mass squared m 2 (µ + µ − ) and by the invariant mass of the proton and ...

由 粒子的四维速度Uµ与 电磁场的四维势Aµ可 构成一个不变量 UµAµ ，因而 L可以 含有一项bUµAµ，b 为一待定常数。 在静电场中，当粒 子运动速度 <<c时， 这项应等于粒子在 静电场中的负位能e ，由此定出b=e。 根据协变性要求， 确定带电粒子在电 磁场中运动的拉格 朗日量为. 式中p是粒子的机械动量。 在电磁场中粒 子的正则动量不等于它的机械动量，而 是附加上一项qA。 f现在我们考察 L 的变换性质。 把上式乘 以 = (1- 2/c2)-1/2得. 右边第一项是粒子的运动能量W（ …

2019年9月13日 · A search for Σ + → p µ+µ− decays with LHCb Run 1 data is presented, yielding an evidence for this decay and a measurement of a branching fraction compatible with the Standard Model. The HyperCP anomaly in the dimuon invariant mass distribution is not confirmed, and its branching fraction central value is excluded at 95% CL.