naa a22 4500 510767575 CHVBK 20180411083202.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s12043-013-0618-0 doi (NATIONALLICENCE)springer-10.1007/s12043-013-0618-0 GIRDHAR AARTI Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chatnaag Road, Jhunsi, 211 019, Allahabad, India aut A clean signal for a top-like isosinglet fermion at the Large Hadron Collider [Elektronische Daten] [AARTI GIRDHAR] We predict a clean signal at the Large Hadron Collider ( $\sqrt{s}=$ 14TeV) for a scenario where there is a top-like, charge + 2/3 vector-like isosinglet fermion. Such a quark, via mixing with the standard model top, can undergo decays via both flavour-changing Z-boson coupling and flavour-changing Yukawa interactions. We concentrate on the latter channel, and study the situation where, following its pair production, the heavy quark pair gives rise to two tops and two Higgs bosons. We show that when each Higgs decays in the $b\bar{b}$ channel, there can be a rather distinct and background-free signal that can unveil the existence of the vector-like isosinglet quark of this kind. Indian Academy of Sciences, 2013 Top-like nationallicence vector-like nationallicence isosinglet nationallicence flavour changing neutral current nationallicence Pramana Springer India 81/6(2013-12-01), 975-986 0304-4289 81:6<975 2013 81 12043 https://doi.org/10.1007/s12043-013-0618-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12043-013-0618-0 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- GIRDHAR AARTI Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chatnaag Road, Jhunsi, 211 019, Allahabad, India aut NATIONALLICENCE 773 0- Pramana Springer India 81/6(2013-12-01), 975-986 0304-4289 81:6<975 2013 81 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer