Constraints on top quark flavor changing neutral currents using diphoton events at the LHC

In this paper we show that the diphoton mass spectrum in proton–proton collisions at the LHC is sensitive to the top quark flavor changing neutral current in the vertices of tuγ and tcγ. The diphoton mass spectrum measured by the CMS experiment at the LHC at a center-of-mass energy of 8 TeV and an i...

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Main Authors:	Sara Khatibi, Mojtaba Mohammadi Najafabadi
Format:	Article
Language:	English
Published:	Elsevier 2016-08-01
Series:	Nuclear Physics B
Online Access:	http://www.sciencedirect.com/science/article/pii/S0550321316301511

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record_format	Article
spelling	doaj-bb309fe56df04e0a8e40f292a3f72d172020-11-24T22:10:09ZengElsevierNuclear Physics B0550-32131873-15622016-08-01909C60761810.1016/j.nuclphysb.2016.06.009Constraints on top quark flavor changing neutral currents using diphoton events at the LHCSara KhatibiMojtaba Mohammadi NajafabadiIn this paper we show that the diphoton mass spectrum in proton–proton collisions at the LHC is sensitive to the top quark flavor changing neutral current in the vertices of tuγ and tcγ. The diphoton mass spectrum measured by the CMS experiment at the LHC at a center-of-mass energy of 8 TeV and an integrated luminosity of 19.5 fb−1 is used as an example to set limits on these FCNC couplings. It is also shown that the angular distribution of the diphotons is sensitive to anomalous tuγ and tcγ couplings and it is a powerful tool to probe any value of the branching fraction of top quark rare decay to an up-type quark plus a photon down to the order of 10−4.http://www.sciencedirect.com/science/article/pii/S0550321316301511
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Sara Khatibi Mojtaba Mohammadi Najafabadi
spellingShingle	Sara Khatibi Mojtaba Mohammadi Najafabadi Constraints on top quark flavor changing neutral currents using diphoton events at the LHC Nuclear Physics B
author_facet	Sara Khatibi Mojtaba Mohammadi Najafabadi
author_sort	Sara Khatibi
title	Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
title_short	Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
title_full	Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
title_fullStr	Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
title_full_unstemmed	Constraints on top quark flavor changing neutral currents using diphoton events at the LHC
title_sort	constraints on top quark flavor changing neutral currents using diphoton events at the lhc
publisher	Elsevier
series	Nuclear Physics B
issn	0550-3213 1873-1562
publishDate	2016-08-01
description	In this paper we show that the diphoton mass spectrum in proton–proton collisions at the LHC is sensitive to the top quark flavor changing neutral current in the vertices of tuγ and tcγ. The diphoton mass spectrum measured by the CMS experiment at the LHC at a center-of-mass energy of 8 TeV and an integrated luminosity of 19.5 fb−1 is used as an example to set limits on these FCNC couplings. It is also shown that the angular distribution of the diphotons is sensitive to anomalous tuγ and tcγ couplings and it is a powerful tool to probe any value of the branching fraction of top quark rare decay to an up-type quark plus a photon down to the order of 10−4.
url	http://www.sciencedirect.com/science/article/pii/S0550321316301511
work_keys_str_mv	AT sarakhatibi constraintsontopquarkflavorchangingneutralcurrentsusingdiphotoneventsatthelhc AT mojtabamohammadinajafabadi constraintsontopquarkflavorchangingneutralcurrentsusingdiphotoneventsatthelhc
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Constraints on top quark flavor changing neutral currents using diphoton events at the LHC

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