Ellis John, Mavromatos Nick E, You Tevong
Theoretical Particle Physics and Cosmology Group, Physics Department, King's College London, London WC2R 2LS, United Kingdom and Theoretical Physics Department, CERN, CH-1211 Geneva 23, Switzerland.
Theoretical Particle Physics and Cosmology Group, Physics Department, King's College London, London WC2R 2LS, United Kingdom.
Phys Rev Lett. 2017 Jun 30;118(26):261802. doi: 10.1103/PhysRevLett.118.261802. Epub 2017 Jun 27.
The recent measurement by ATLAS of light-by-light scattering in LHC Pb-Pb collisions is the first direct evidence for this basic process. We find that it excludes a range of the mass scale of a nonlinear Born-Infeld extension of QED that is ≲100 GeV, a much stronger constraint than those derived previously. In the case of a Born-Infeld extension of the standard model in which the U(1){Y} hypercharge gauge symmetry is realized nonlinearly, the limit on the corresponding mass reach is ∼90 GeV, which, in turn, imposes a lower limit of ≳11 TeV on the magnetic monopole mass in such a U(1){Y} Born-Infeld theory.
近期ATLAS对大型强子对撞机（LHC）铅-铅碰撞中光-光散射的测量是这一基本过程的首个直接证据。我们发现，它排除了量子电动力学（QED）非线性玻恩-因费尔德扩展的一系列质量尺度，该尺度≲100 GeV，这一限制比之前推导的要强得多。在标准模型的玻恩-因费尔德扩展情形下，其中U(1)_Y超荷规范对称性以非线性方式实现，相应质量范围的极限约为90 GeV，这反过来又对这种U(1)_Y玻恩-因费尔德理论中的磁单极子质量施加了≳11 TeV的下限。
