论文标题
轻度散射和时空不合作力
Light-by-Light Scattering and Spacetime Noncommutativity
论文作者
论文摘要
The aim of this article is to explore a potential usability of a photon-photon self-interaction from the noncommutative quantum electrodynamics (NCQED) in the case of light-by-light scattering ($γγ\toγγ$) in ultraperipheral Pb+Pb collisions, a reaction measured recently by ATLAS and planned for future experiments in hadron-hadron colliders.我们对各种非交易量表，$ \rmλ_{nc} $ and uniosing ucovening ucut-nuc-nuc-nuc-nuc-nuc-Spinergy组合，我们在等效光子近似中计算了整个单循环标准模型（SM）和树级NCQED振幅，并在等效的光子近似情况下进行撞击参数。我们发现，NCQED对横截面的贡献在不变的质量范围高于$ \rmλ_{nc} $时具有相当大的增加，而SM贡献在此类区域被强烈抑制。我们的结果表明，当前的Atlas $ \ rm \ sqrt {s_ {nn}} = 5.02 $ TEV实验只能探测$ \rmλ_{nc} <100 $ gev区域。 On the other hand, future hadron-hadron collider proposals could have the potential to extend to $\rmΛ_{NC}\lesssim 300$ GeV region, making the performance of $\rm Pb+Pb(γγ)\to Pb+Pbγγ$ scattering on testing space-time noncommutativity close to that of the previously proposed photon-photon mode of linear electron-positron collider.
The aim of this article is to explore a potential usability of a photon-photon self-interaction from the noncommutative quantum electrodynamics (NCQED) in the case of light-by-light scattering ($γγ\toγγ$) in ultraperipheral Pb+Pb collisions, a reaction measured recently by ATLAS and planned for future experiments in hadron-hadron colliders. We compute the total cross section from both, the full one-loop standard model (SM) and the tree-level NCQED amplitudes, in the equivalent photon approximation with impact parameters, for various noncommutative scales, $\rmΛ_{NC}$, and incoming nuclear spin-energy combinations. We find that NCQED contribution to the cross section has considerable increase at diphoton invariant mass range higher than $\rmΛ_{NC}$, while the SM contribution is strongly suppressed in such region. Our results show that the current ATLAS $\rm\sqrt{s_{NN}} = 5.02$ TeV experiment can only probe $\rmΛ_{NC}<100$ GeV region. On the other hand, future hadron-hadron collider proposals could have the potential to extend to $\rmΛ_{NC}\lesssim 300$ GeV region, making the performance of $\rm Pb+Pb(γγ)\to Pb+Pbγγ$ scattering on testing space-time noncommutativity close to that of the previously proposed photon-photon mode of linear electron-positron collider.
