Interplay of vector-like top partner multiplets in a realistic mixing set-up

Cacciapaglia, Giacomo (Université de Lyon, France, Université Lyon 1, CNRS/IN2P3, UMR5822 IPNL, F-69622, Villeurbanne Cedex, France) ; Deandrea, Aldo (Université de Lyon, France, Université Lyon 1, CNRS/IN2P3, UMR5822 IPNL, F-69622, Villeurbanne Cedex, France) (Institut Universitaire de France, 103 boulevard Saint-Michel, 75005, Paris, France) ; Gaur, Naveen (Department of Physics, Dyal Singh College, University of Delhi, Lodi Road, New Delhi, 110003, India) ; Harada, Daisuke (Centre for High Energy Physics, Indian Institute of Science, Bangalore, 560012, India) ; Okada, Yasuhiro (KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan) (Department of Particle and Nuclear Physics, Graduate University for Advanced Studies Sokendai, 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan) ; Panizzi, Luca (School of Physics and Astronomy, University of Southampton, Highfield, Southampton, SO17 1BJ, United Kingdom)

09 September 2015

Abstract: The ATLAS and CMS collaborations at the LHC have performed analyses on the existing data sets, studying the case of one vector-like fermion or multiplet coupling to the standard model Yukawa sector. In the near future, with more data available, these experimental collaborations will start to investigate more realistic cases. The presence of more than one extra vector-like multiplet is indeed a common situation in many extensions of the standard model. The interplay of these vector-like multiplet between precision electroweak bounds, flavour and collider phenomenology is a important question in view of establishing bounds or for the discovery of physics beyond the standard model. In this work we study the phenomenological consequences of the presence of two vector-like multiplets. We analyse the constraints on such scenarios from tree-level data and oblique corrections for the case of mixing to each of the SM generations. In the present work, we limit to scenarios with two top-like partners and no mixing in the down-sector.


Published in: JHEP 1509 (2015) 012
Published by: Springer/SISSA
DOI: 10.1007/JHEP09(2015)012
arXiv: 1502.00370
License: CC-BY-4.0



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