手征对称格点量子色动力学的质子寿命界
Proton lifetime bounds from chirally symmetric lattice QCD
摘要:
我们目前的结果在大统一理论(GUTs)的质子衰变相关的矩阵元素。计算是在固定的晶格间距a^{-1}=1.73(3)GeV下进行的,使用尺寸为16 ^3 \times 32和24 ^3 \times 64的晶格上的2+1畴壁费米子,第五维长度为16。我们使用的是间接方法,它依赖于质子衰变的有效场论描述,我们需要估计低能常数,α= -0.0112(25)GeV^3,β= 0.0120(26)GeV^3。我们使用领先阶手征微扰理论将这些低能常数与质子衰变矩阵元联系起来。然后,这些可以结合实验上的质子寿命约束参数的个别大统一理论。
英文摘要:
We present results for the matrix elements relevant for proton decay in Grand Unified Theories (GUTs). The calculation is performed at a fixed lattice spacing a^{-1}=1.73(3) GeV using 2+1 flavors of domain wall fermions on lattices of size 16^3\times32 and 24^3\times64 with a fifth dimension of length 16. We use the indirect method which relies on an effective field theory description of proton decay, where we need to estimate the low energy constants, α= -0.0112(25) GeV^3 and β= 0.0120(26) GeV^3. We relate these low energy constants to the proton decay matrix elements using leading order chiral perturbation theory. These can then be combined with experimental bounds on the proton lifetime to bound parameters of individual GUTs.
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。