Malekhosseini, Malihe and Ghominejad, Mehrdad and Khanpour, Hamzeh and Najafabadi, Mojtaba Mohammadi (2018) Constraining top quark flavor violation and dipole moments through three and four top quark productions at the LHC. Physical Review D, 98 (095001). ISSN 2470-0029

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Abstract

In this paper, we examine the sensitivity of the three top quark production at the LHC to the top quark flavor-changing neutral currents (FCNC) as well as the sensitivity of the four top production to the strong and weak dipole moments of the top quark. Upper limits at 95% CL on the branching fractions of Bðt → qXÞ, where X ¼ g, Z, γ, H and q ¼ u, c, are set by performing an analysis on three top events in the same-sign dilepton channel. We consider the main sources of the background processes and a realistic detector simulation is performed at the center-of-mass energy of 14 TeV. In the second part of this work, based on the recent upper limits which have been set on the four top quark cross section by the ATLAS and CMS collaborations from 13 TeV data, we constrain the top quark strong and weak dipole moments. The bounds on the top quark dipole moments are presented using the future LHC prospects for four top quark cross-section measurements.

Item Type:	Article
Additional Information:	Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Cite as: Malekhosseini, Malihe & Ghominejad, Mehrdad & Khanpour, Hamzeh & Mohammadi Najafabadi, Mojtaba. (2018). Constraining top quark flavor violation and dipole moments through three and four top quark productions at the LHC. 98. 095001. 10.1103/PhysRevD.98.095001.
Keywords:	top quark flavor violation; dipole moments; three and four top quark productions; LHC;
Academic Unit:	Faculty of Science and Engineering > Theoretical Physics
Item ID:	14780
Identification Number:	https://doi.org/10.1103/PhysRevD.98.095001
Depositing User:	Hamzeh Khanpour
Date Deposited:	10 Sep 2021 15:34
Journal or Publication Title:	Physical Review D
Publisher:	American Physical Society
Refereed:	Yes
Funders:	School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), University of Science and Technology of Mazandaran
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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