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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2014
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79050 |
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I19-R120-10915-79050 |
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Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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SEDICI (UNLP) |
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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>λ<!-- 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>λ<!-- 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 |
bdutipo_str |
Repositorios |
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1764820487046692864 |