2020/03/31 by Priyotosh Bandyopadhyay, Saunak Dutta, Anirban Karan
Physics and Astronomy · #Amplitude #Astrophysics and Cosmic Phenomena #Collider #Lepton #Leptoquark #Luminosity #Momentum (technical analysis) #Pair production #Particle physics theoretical and experimental studies #Photon #Radiation Detection and Scintillator Technologies #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-020-8083-7
published as Eur. Phys. J. C 80 (2020) 6, 573 · 46 pages, 14 figures, 15 tables, accepted in EPJC. The effects of non-monochromatic photons have been included
openalex created_date 2020/04/03 · openalex publication_date 2020/06/01 · arxiv created 2020/06/24 · arxiv updated 2020/07/15 · openalex updated_date 2026/08/05
Abstract Leptoquarks belong to the possible candidates for explaining various anomalies in flavor physics. Nonetheless, their existence is yet to be confirmed on the experimental side. In this paper we show how zeros of the single-photon tree-level amplitude can be used to extract information as regards leptoquarks in the case of e – γ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> colliders. A small number of standard model backgrounds keep the signal clean in this kind of colliders. Unlike other colliders, the zeros of the single-photon amplitude here depend on √(s) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt></mml:math> and on the mass of leptoquark along with its electric charge. We perform a PYTHIA based simulation for reconstructing the leptoquark from its decay products of the first generation and estimating the background with luminosity of 100 \hbox fb-1 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>100</mml:mn><mml:mspace/><mml:msup><mml:mtext>fb</mml:mtext><mml:mrow><mml:mo>-</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> . Our analysis is done for all the leptoquarks that can be seen at an e – γ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> collider with three different masses (70 GeV, 650 GeV and 1 TeV) and three different center of momentum energies (200 GeV, 2 TeV and 3 TeV). The effects of non-monochromatic photons on the zeros of the amplitude under laser backscattering and the equivalent photon approximation have also been addressed.