26–29 Oct 2021
Fully online format
Asia/Tokyo timezone

Leptoquarks and Zeros of Amplitude at Electron-Photon Collider

28 Oct 2021, 17:10
20m
Room #3 (Zoom Meeting ID: 814 7454 2635)

Room #3

Zoom Meeting ID: 814 7454 2635

Oral presentation using Zoom Session V: Alternative collider modes V: Alternative collider modes

Speaker

Anirban Karan (IIT Hyderabad)

Description

Though leptoquarks have gained much attention in recent time due to their ability to explain various flavour anomalies, their existence is not confirmed yet experimentally [1]. But, we find that zeros of single photon tree level amplitude [2,3] have the potential to provide information about leptoquarks (if any) at electron-photon collider [4]. It is a well known fact that the tree-level single photon amplitudes for various electroweak processes vanish at certain regions of phase space depending on the electric charges and four-momenta of the external particles [3]. On the other hand, using the technique of laser-backscattering [5], one electron-positron collider can be transformed to an electron-photon collision machine. A small number of SM backgrounds would keep the signal very clean in this collider. We have used a PYTHIA based simulation for production of leptoquark associated with a quark at electron-photon collider to obtain the results which are very encouraging.

References

1) I. Dorsner, S. Fajfer, A. Greljo, J. F. Kamenik and N. Kosnik, Physics of leptoquarks in precision experiments and at particle colliders, Phys. Rept. 641, 1-68 (2016), doi:10.1016/j.physrep.2016.06.001.

2) K. O. Mikaelian, M. A. Samuel and D. Sahdev, The Magnetic Moment of Weak Bosons Produced in p p and p anti-p Collisions, Phys. Rev. Lett. 43, 746 (1979), doi:10.1103/PhysRevLett.43.746.

3) S. J. Brodsky and R. W. Brown, Zeros in Amplitudes: Gauge Theory and Radiation Interference, Phys. Rev. Lett. 49, 966 (1982), doi:10.1103/PhysRevLett.49.966.

4) P. Bandyopadhyay, S. Dutta and A. Karan, Investigating the Production of Leptoquarks by Means of Zeros of Amplitude at Photon Electron Collider, Eur. Phys. J. C 80, no.6, 573 (2020), doi:10.1140/epjc/s10052-020-8083-7.

5) I. F. Ginzburg, G. L. Kotkin, V. G. Serbo and Valery I. Telnov, Colliding $\gamma e$ and $\gamma\gamma$ beams based on the Single Pass Accelerators (of Vlepp Type), Nucl.Instrum.Meth. 205 (1983) 47-68.

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Primary author

Anirban Karan (IIT Hyderabad)

Co-authors

Priyotosh Bandyopadhyay (IIT Hyderabad) Saunak Dutta (SGTB Khalsa College)

Presentation materials