Monopole production via photon fusion and Drell-Yan processes: MadGraph implementation and perturbativity via velocity-dependent coupling and magnetic moment as novel features

被引：28

作者：

Baines, S. ^{[1
]}

Mavromatos, N. E. ^{[1
]}

Mitsou, V. A. ^{[2
]}

Pinfold, J. L. ^{[3
]}

Santra, A. ^{[2
]}

机构：

[1] Kings Coll London, Dept Phys, Theoret Particle Phys & Cosmol Grp, London WC2R 2LS, England

[2] Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, C Catedrat Jose Beltran 2, Valencia 46980, Spain

[3] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E4, Canada

来源：

EUROPEAN PHYSICAL JOURNAL C | 2018年 / 78卷 / 11期

关键词：

PAIR PRODUCTION; COLLISIONS;

D O I：

10.1140/epjc/s10052-018-6440-6

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this work we consider point-like monopole production via photon-fusion and Drell-Yan processes in the framework of an effective U(1) gauge field theory obtained from conventional models describing the interaction of magnetically-charged fields with ordinary photons, upon electric-magnetic dualisation. We present arguments based on such dualities which support the conjecture of an effective monopole-velocity-dependent magnetic charge. For the cases of 1 monopoles, we also include a magnetic-moment which is treated as a new phenomenological parameter and, together with the velocity-dependent coupling, allows for a perturbative treatment of the cross-section calculation. We discuss unitarity issues within these effective field theories, in particular we point out that in the spin-1 monopole case only the may restore unitarity. However from an effective-field-theory point of view, this lack of unitarity should not be viewed as an impediment for the phenomenological studies and experimental searches of generic spin-1 monopoles, given that the potential appearance of new degrees of freedom in the ultraviolet completion of such models might restore it. The second part of the paper deals with an appropriate implementation of photon-fusion and Drell-Yan processes based on the above theoretical scenarios into MadGraph UFO models, aimed to serve as a useful tool in interpretations of monopole searches at colliders such as LHC, especially for photon fusion, given that it has not been considered by experimental collaborations so far. Moreover, the experimental implications of such perturbatively reliable monopole searches have been laid out.

引用

页数：36

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