Search for charged Higgs bosons through the violation of lepton universality in t(t)over-bar events using pp collision data at root s=7 TeV with the ATLAS experiment
2013
Authors
Aad, G.Borjanović, Iris
Božović-Jelisavčić, Ivanka
Ćirković, Predrag
Agatonović-Jovin, Tatjana
Krstić, Jelena
Mamužić, Judita
Milutinović-Dumbelović, Gordana
Popović, D. S.
Sijacki, Dj.
Simica, Lj.
Vranješ, Nenad
Vranješ Milosavljević, Marija
Živković, Lada
ATLAS Collaboration (ukupan broj autora: 2901)
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In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H+, t - GT bH(+), in addition to the Standard Model decay t - GT bW. Since W bosons decay to the three lepton generations equally, while H+ may predominantly decay into tau nu, charged Higgs bosons can be searched for using the violation of lepton universality in top quark decays. The analysis in this paper is based on 4.6 fb(-1) of proton-proton collision data at root s = 7 TeV collected by the ATLAS experiment at the Large Hadron Collider. Signatures containing leptons (e or mu) and/or a hadronically decaying tau (tau(had)) are used. Event yield ratios between e+ tau(had) and e + mu, as well as between mu + tau(had) and mu + e, final states are measured in the data and compared to predictions from simulations. This ratio-based method reduces the impact of systematic uncertainties in the analysis. No significant deviation from the Standard Model predictions is obser...ved. With the assumption that the branching fraction B(H+ - GT tau nu) is 100%, upper limits in the range 3.2%-4.4% can be placed on the branching fraction B(t - GT bH(+)) for charged Higgs boson masses m(H+) in the range 90-140GeV. After combination with results from a search for charged Higgs bosons in t (t) over bar decays using the tau(had) + jets final state, upper limits on B(t - GT bH(+)) can be set in the range 0.8%-3.4%, for m(H+) in the range 90-160GeV.
Keywords:
Hadron-Hadron ScatteringSource:
Journal of High Energy Physics, 2013, 3Funding / projects:
- ANPCyT, Argentina, YerPhI, Armenia, ARC, Australia, BMWF, Austria, FWF, Austria, ANAS, Azerbaijan, SSTC, Belarus, CNPq, Brazil, FAPESP, Brazil, NSERC, Canada, NRC, Canada, CFI, Canada, CERN, CONICYT, Chile, CAS, China, MOST, China, NSFC, China, COLCIENCIAS, Colombia, MSMT CR, Czech Republic, MPO CR, Czech Republic, VSC CR, Czech Republic, DNRF, Denmark, DNSRC, Denmark, Lundbeck Foundation, Denmark, EPLANET, European Union, ERC, European Union, NSRF, European Union, IN2P3-CNRS, France, CEA-DSM/IRFU, France, GNSF, Georgia, BMBF, Germany, DFG, Germany, HGF, Germany, MPG, Germany, AvH Foundation, Germany, GSRT, Greece, NSRF, Greece, ISF, Israel, MINERVA, Israel, GIF, Israel, DIP, Israel, Benoziyo Center, Israel, INFN, Italy, MEXT, Japan, JSPS, Japan, CNRST, Morocco, FOM, Netherlands, NWO, Netherlands, BRF, Norway, RCN, Norway, MNiSW, Poland, GRICES, Portugal, FCT, Portugal, MERYS (MECTS), Romania, MES of Russia, Russian Federation, ROSATOM, Russian Federation, JINR, MSTD, Serbia, MSSR, Slovakia, ARRS, Slovenia, MVZT, Slovenia, DST/NRF, South Africa, MICINN, Spain, SRC, Sweden, Wallenberg Foundation, Sweden, SER, Switzerland, SNSF, Switzerland, Canton of Bern, Switzerland, Canton of Geneva, Switzerland, NSC, Taiwan, TAEK, Turkey, STFC, United Kingdom, Royal Society, United Kingdom, Leverhulme Trust, United Kingdom, DOE, United States of America, NSF, United States of America, ICREA
DOI: 10.1007/JHEP03(2013)076
ISSN: 1029-8479
WoS: 000317521200076
Scopus: 2-s2.0-84876245762
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VinčaTY - JOUR AU - Aad, G. AU - Borjanović, Iris AU - Božović-Jelisavčić, Ivanka AU - Ćirković, Predrag AU - Agatonović-Jovin, Tatjana AU - Krstić, Jelena AU - Mamužić, Judita AU - Milutinović-Dumbelović, Gordana AU - Popović, D. S. AU - Sijacki, Dj. AU - Simica, Lj. AU - Vranješ, Nenad AU - Vranješ Milosavljević, Marija AU - Živković, Lada PY - 2013 UR - https://vinar.vin.bg.ac.rs/handle/123456789/5415 AB - In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H+, t - GT bH(+), in addition to the Standard Model decay t - GT bW. Since W bosons decay to the three lepton generations equally, while H+ may predominantly decay into tau nu, charged Higgs bosons can be searched for using the violation of lepton universality in top quark decays. The analysis in this paper is based on 4.6 fb(-1) of proton-proton collision data at root s = 7 TeV collected by the ATLAS experiment at the Large Hadron Collider. Signatures containing leptons (e or mu) and/or a hadronically decaying tau (tau(had)) are used. Event yield ratios between e+ tau(had) and e + mu, as well as between mu + tau(had) and mu + e, final states are measured in the data and compared to predictions from simulations. This ratio-based method reduces the impact of systematic uncertainties in the analysis. No significant deviation from the Standard Model predictions is observed. With the assumption that the branching fraction B(H+ - GT tau nu) is 100%, upper limits in the range 3.2%-4.4% can be placed on the branching fraction B(t - GT bH(+)) for charged Higgs boson masses m(H+) in the range 90-140GeV. After combination with results from a search for charged Higgs bosons in t (t) over bar decays using the tau(had) + jets final state, upper limits on B(t - GT bH(+)) can be set in the range 0.8%-3.4%, for m(H+) in the range 90-160GeV. T2 - Journal of High Energy Physics T1 - Search for charged Higgs bosons through the violation of lepton universality in t(t)over-bar events using pp collision data at root s=7 TeV with the ATLAS experiment IS - 3 DO - 10.1007/JHEP03(2013)076 ER -
@article{ author = "Aad, G. and Borjanović, Iris and Božović-Jelisavčić, Ivanka and Ćirković, Predrag and Agatonović-Jovin, Tatjana and Krstić, Jelena and Mamužić, Judita and Milutinović-Dumbelović, Gordana and Popović, D. S. and Sijacki, Dj. and Simica, Lj. and Vranješ, Nenad and Vranješ Milosavljević, Marija and Živković, Lada", year = "2013", abstract = "In several extensions of the Standard Model, the top quark can decay into a bottom quark and a light charged Higgs boson H+, t - GT bH(+), in addition to the Standard Model decay t - GT bW. Since W bosons decay to the three lepton generations equally, while H+ may predominantly decay into tau nu, charged Higgs bosons can be searched for using the violation of lepton universality in top quark decays. The analysis in this paper is based on 4.6 fb(-1) of proton-proton collision data at root s = 7 TeV collected by the ATLAS experiment at the Large Hadron Collider. Signatures containing leptons (e or mu) and/or a hadronically decaying tau (tau(had)) are used. Event yield ratios between e+ tau(had) and e + mu, as well as between mu + tau(had) and mu + e, final states are measured in the data and compared to predictions from simulations. This ratio-based method reduces the impact of systematic uncertainties in the analysis. No significant deviation from the Standard Model predictions is observed. With the assumption that the branching fraction B(H+ - GT tau nu) is 100%, upper limits in the range 3.2%-4.4% can be placed on the branching fraction B(t - GT bH(+)) for charged Higgs boson masses m(H+) in the range 90-140GeV. After combination with results from a search for charged Higgs bosons in t (t) over bar decays using the tau(had) + jets final state, upper limits on B(t - GT bH(+)) can be set in the range 0.8%-3.4%, for m(H+) in the range 90-160GeV.", journal = "Journal of High Energy Physics", title = "Search for charged Higgs bosons through the violation of lepton universality in t(t)over-bar events using pp collision data at root s=7 TeV with the ATLAS experiment", number = "3", doi = "10.1007/JHEP03(2013)076" }
Aad, G., Borjanović, I., Božović-Jelisavčić, I., Ćirković, P., Agatonović-Jovin, T., Krstić, J., Mamužić, J., Milutinović-Dumbelović, G., Popović, D. S., Sijacki, Dj., Simica, Lj., Vranješ, N., Vranješ Milosavljević, M.,& Živković, L.. (2013). Search for charged Higgs bosons through the violation of lepton universality in t(t)over-bar events using pp collision data at root s=7 TeV with the ATLAS experiment. in Journal of High Energy Physics(3). https://doi.org/10.1007/JHEP03(2013)076
Aad G, Borjanović I, Božović-Jelisavčić I, Ćirković P, Agatonović-Jovin T, Krstić J, Mamužić J, Milutinović-Dumbelović G, Popović DS, Sijacki D, Simica L, Vranješ N, Vranješ Milosavljević M, Živković L. Search for charged Higgs bosons through the violation of lepton universality in t(t)over-bar events using pp collision data at root s=7 TeV with the ATLAS experiment. in Journal of High Energy Physics. 2013;(3). doi:10.1007/JHEP03(2013)076 .
Aad, G., Borjanović, Iris, Božović-Jelisavčić, Ivanka, Ćirković, Predrag, Agatonović-Jovin, Tatjana, Krstić, Jelena, Mamužić, Judita, Milutinović-Dumbelović, Gordana, Popović, D. S., Sijacki, Dj., Simica, Lj., Vranješ, Nenad, Vranješ Milosavljević, Marija, Živković, Lada, "Search for charged Higgs bosons through the violation of lepton universality in t(t)over-bar events using pp collision data at root s=7 TeV with the ATLAS experiment" in Journal of High Energy Physics, no. 3 (2013), https://doi.org/10.1007/JHEP03(2013)076 . .