Neutrino Magnetic Moment and the Muon g-2 Tension

被引:0
|
作者
Carneiro, S. [1 ,2 ]
Sobrinho, F. C. [1 ,3 ]
机构
[1] Univ Fed Bahia, Inst Fis, BR-40210340 Salvador, BA, Brazil
[2] Observ Nacl, BR-20921400 Rio De Janeiro, RJ, Brazil
[3] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, SP, Brazil
关键词
Relativistic entanglement; Neutrino magnetic moment; Muon g-factor; Muon decay;
D O I
10.1007/s13538-023-01318-5
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
It is suggested that the precession of the boosted neutrino magnetic moments in the external magnetic field may explain the tension between the muon anomalous g-factor measured in the Muon g - 2 experiments and the theoretical value predicted by the Standard Model. As the neutrinos and positron resulting from the muon decay are entangled prior to the positron detection, the interaction of the neutrino dipoles with the magnetic field gives origin to an uncertainty in the time modulation of the positron angular distribution. The translated uncertainty in the muon g-factor, delta a(mu) approximate to (1.96 +/- 0.68) ppm, presents 1 sigma agreement with the anomaly measured at Fermilab, delta a(mu) approximate to (2.14 +/- 0.50) ppm. A dependence of the anomaly on the positron energy is also predicted and can be experimentally verified. A fitting of the Brookhaven binned data suggests such a dependence, with chi(2)(r) = 0.86, better than with an energy-independent anomaly, which gives chi(2)(r) = 0.78.
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页数:5
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