Quantum Gravity and Maximum Attainable Velocities in the Standard Model

Understand

A main difficulty in the quantization of the gravitational field is the lack of experiments that discriminate among the theories proposed to quantize gravity.

• Recently we showed that the Standard Model(SM) itself contains tiny Lorentz invariance violation(LIV) terms coming from QG.
• All terms depend on one arbitrary parameter $\alpha$ that set the scale of QG effects.
• In this talk we review the LIV for mesons nucleons and leptons and apply it to study several effects, including the GZK anomaly.