Search for top quark decays t → qH with H → γγ using the ATLAS detector

A search is performed for flavour-changing neutral currents in the decay of a top quark to an up-type (c, u) quark and a Higgs boson, where the Higgs boson decays to two photons. The proton-proton collision data set used corresponds to 4.7 fb−1 at √s = 7TeV and 20.3 fb−1 at √s = 8TeV collected by th...

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Detalles Bibliográficos
Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Exactas
Física
hadron-hadron scattering
top quark
ATLAS detector
Higgs boson
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79050
Aporte de:
Aportado por : SEDICI (UNLP) de Universidad Nacional de La Plata .
id I19-R120-10915-79050
record_format dspace
spelling I19-R120-10915-790502020-05-22T04:06:27Z http://sedici.unlp.edu.ar/handle/10915/79050 issn:1029-8479 Search for top quark decays t → qH with H → γγ using the ATLAS detector Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. The ATLAS Collaboration 2014-06-03 2019-08-13T18:08:28Z en Ciencias Exactas Física hadron-hadron scattering top quark ATLAS detector Higgs boson A search is performed for flavour-changing neutral currents in the decay of a top quark to an up-type (c, u) quark and a Higgs boson, where the Higgs boson decays to two photons. The proton-proton collision data set used corresponds to 4.7 fb−1 at √s = 7TeV and 20.3 fb−1 at √s = 8TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for in which one top quark decays to qH and the other decays to bW. Both the hadronic and the leptonic decay modes of the W boson are used. No significant signal is observed and an upper limit is set on the t → qH branching ratio of 0.79% at the 95% confidence level. The corresponding limit on the tqH coupling combination <math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mrow class="MJX-TeXAtom-ORD"><msubsup><mi>&#x03BB;<!-- λ --></mi><mrow class="MJX-TeXAtom-ORD"><mi>t</mi><mi>c</mi><mi>H</mi></mrow><mn>2</mn></msubsup><mo>+</mo><msubsup><mi>&#x03BB;<!-- λ --></mi><mrow class="MJX-TeXAtom-ORD"><mi>t</mi><mi>u</mi><mi>H</mi></mrow><mn>2</mn></msubsup></mrow></msqrt></math> is 0.17. Facultad de Ciencias Exactas Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
hadron-hadron scattering
top quark
ATLAS detector
Higgs boson
spellingShingle Ciencias Exactas
Física
hadron-hadron scattering
top quark
ATLAS detector
Higgs boson
Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
Search for top quark decays t → qH with H → γγ using the ATLAS detector
topic_facet Ciencias Exactas
Física
hadron-hadron scattering
top quark
ATLAS detector
Higgs boson
description A search is performed for flavour-changing neutral currents in the decay of a top quark to an up-type (c, u) quark and a Higgs boson, where the Higgs boson decays to two photons. The proton-proton collision data set used corresponds to 4.7 fb−1 at √s = 7TeV and 20.3 fb−1 at √s = 8TeV collected by the ATLAS experiment at the LHC. Top quark pair events are searched for in which one top quark decays to qH and the other decays to bW. Both the hadronic and the leptonic decay modes of the W boson are used. No significant signal is observed and an upper limit is set on the t → qH branching ratio of 0.79% at the 95% confidence level. The corresponding limit on the tqH coupling combination <math xmlns="http://www.w3.org/1998/Math/MathML"><msqrt><mrow class="MJX-TeXAtom-ORD"><msubsup><mi>&#x03BB;<!-- λ --></mi><mrow class="MJX-TeXAtom-ORD"><mi>t</mi><mi>c</mi><mi>H</mi></mrow><mn>2</mn></msubsup><mo>+</mo><msubsup><mi>&#x03BB;<!-- λ --></mi><mrow class="MJX-TeXAtom-ORD"><mi>t</mi><mi>u</mi><mi>H</mi></mrow><mn>2</mn></msubsup></mrow></msqrt></math> is 0.17.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Search for top quark decays t → qH with H → γγ using the ATLAS detector
title_short Search for top quark decays t → qH with H → γγ using the ATLAS detector
title_full Search for top quark decays t → qH with H → γγ using the ATLAS detector
title_fullStr Search for top quark decays t → qH with H → γγ using the ATLAS detector
title_full_unstemmed Search for top quark decays t → qH with H → γγ using the ATLAS detector
title_sort search for top quark decays t → qh with h → γγ using the atlas detector
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/79050
work_keys_str_mv AT alconadaverzinimariajosefina searchfortopquarkdecaystqhwithhngusingtheatlasdetector
AT alonsofrancisco searchfortopquarkdecaystqhwithhngusingtheatlasdetector
AT anduagaxabiersebastian searchfortopquarkdecaystqhwithhngusingtheatlasdetector
AT dovamariateresa searchfortopquarkdecaystqhwithhngusingtheatlasdetector
AT monticellifernandogabriel searchfortopquarkdecaystqhwithhngusingtheatlasdetector
AT tripianamartinf searchfortopquarkdecaystqhwithhngusingtheatlasdetector
AT theatlascollaboration searchfortopquarkdecaystqhwithhngusingtheatlasdetector
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