Search for FCNC single top-quark production at root s=7 TeV with the ATLAS detector
2012
Аутори
Aad, G.Borjanović, Iris
Božović-Jelisavčić, Ivanka
Agatonović-Jovin, Tatjana
Krstić, Jelena
Mamužić, Judita
Mudrinić, Mihajlo
Popović, D. S.
Sijacki, Dj.
Simić, Lj.
Vranješ, Nenad
Vranješ Milosavljević, Marija
Živković, Lada
ATLAS Collaboration (ukupan broj autora: 3042)
Чланак у часопису
Метаподаци
Приказ свих података о документуАпстракт
A search for the production of single top-quarks via flavour-changing neutral-currents is presented. Data collected with the ATLAS detector at a centre-of-mass energy of root s = 7 TeV, corresponding to an integrated luminosity of 2.05 fb(-1), are used. Candidate events with a semileptonic top-quark decay signature are classified as signal- or background-like events by using several kinematic variables as input to a neural network. No signal is observed in the neural network output distribution and a Bayesian upper limit is placed on the production cross-section. The observed upper limit at 95% confidence level on the cross-section multiplied by the t - GT Wb branching fraction is measured to be sigma(qg - GT t) x B(t - GT Wb) LT 3.9 pb. This upper limit is converted using a model-independent approach into upper limits on the coupling strengths kappa(ugt)/Lambda LT 6.9.10(-3) TeV-1 and kappa(cgt)/Lambda LT 1.6.10(-2) TeV-1, where A is the new physics scale, and on the branching fractio...ns B(t - GT ug) LT 5.7.10(-5) and B(t - GT cg) LT 2.7.10(-4). (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.
Кључне речи:
Top physics / Heavy-quark production / FCNC / Single top quarkИзвор:
Physics Letters B, 2012, 712, 4-5, 351-369Финансирање / пројекти:
- ANPCyT, Argentina, YerPhI, Armenia, ARC, Australia, BMWF, 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, IN2P3-CNRS, France, CEA-DSM/IRFU, France, GNAS, Georgia, BMBF, Germany, DFG, Germany, HGF, Germany, MPG, Germany, AvH Foundation, Germany, GSRT, Greece, ISF, Israel, MINERVA, Germany, GIF, Israel, DIP, Israel, Benoziyo Center, Israel, INFN, Italy, MEXT, Japan, JSPS, Japan, CNRST, Morocco, FOM, Netherlands, NWO, Netherlands, 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, NSF, United States, ICREA
DOI: 10.1016/j.physletb.2012.05.022
ISSN: 0370-2693; 1873-2445
WoS: 000305378200006
Scopus: 2-s2.0-85041997804
Колекције
Институција/група
VinčaTY - JOUR AU - Aad, G. AU - Borjanović, Iris AU - Božović-Jelisavčić, Ivanka AU - Agatonović-Jovin, Tatjana AU - Krstić, Jelena AU - Mamužić, Judita AU - Mudrinić, Mihajlo AU - Popović, D. S. AU - Sijacki, Dj. AU - Simić, Lj. AU - Vranješ, Nenad AU - Vranješ Milosavljević, Marija AU - Živković, Lada PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4892 AB - A search for the production of single top-quarks via flavour-changing neutral-currents is presented. Data collected with the ATLAS detector at a centre-of-mass energy of root s = 7 TeV, corresponding to an integrated luminosity of 2.05 fb(-1), are used. Candidate events with a semileptonic top-quark decay signature are classified as signal- or background-like events by using several kinematic variables as input to a neural network. No signal is observed in the neural network output distribution and a Bayesian upper limit is placed on the production cross-section. The observed upper limit at 95% confidence level on the cross-section multiplied by the t - GT Wb branching fraction is measured to be sigma(qg - GT t) x B(t - GT Wb) LT 3.9 pb. This upper limit is converted using a model-independent approach into upper limits on the coupling strengths kappa(ugt)/Lambda LT 6.9.10(-3) TeV-1 and kappa(cgt)/Lambda LT 1.6.10(-2) TeV-1, where A is the new physics scale, and on the branching fractions B(t - GT ug) LT 5.7.10(-5) and B(t - GT cg) LT 2.7.10(-4). (C) 2012 CERN. Published by Elsevier B.V. All rights reserved. T2 - Physics Letters B T1 - Search for FCNC single top-quark production at root s=7 TeV with the ATLAS detector VL - 712 IS - 4-5 SP - 351 EP - 369 DO - 10.1016/j.physletb.2012.05.022 ER -
@article{ author = "Aad, G. and Borjanović, Iris and Božović-Jelisavčić, Ivanka and Agatonović-Jovin, Tatjana and Krstić, Jelena and Mamužić, Judita and Mudrinić, Mihajlo and Popović, D. S. and Sijacki, Dj. and Simić, Lj. and Vranješ, Nenad and Vranješ Milosavljević, Marija and Živković, Lada", year = "2012", abstract = "A search for the production of single top-quarks via flavour-changing neutral-currents is presented. Data collected with the ATLAS detector at a centre-of-mass energy of root s = 7 TeV, corresponding to an integrated luminosity of 2.05 fb(-1), are used. Candidate events with a semileptonic top-quark decay signature are classified as signal- or background-like events by using several kinematic variables as input to a neural network. No signal is observed in the neural network output distribution and a Bayesian upper limit is placed on the production cross-section. The observed upper limit at 95% confidence level on the cross-section multiplied by the t - GT Wb branching fraction is measured to be sigma(qg - GT t) x B(t - GT Wb) LT 3.9 pb. This upper limit is converted using a model-independent approach into upper limits on the coupling strengths kappa(ugt)/Lambda LT 6.9.10(-3) TeV-1 and kappa(cgt)/Lambda LT 1.6.10(-2) TeV-1, where A is the new physics scale, and on the branching fractions B(t - GT ug) LT 5.7.10(-5) and B(t - GT cg) LT 2.7.10(-4). (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.", journal = "Physics Letters B", title = "Search for FCNC single top-quark production at root s=7 TeV with the ATLAS detector", volume = "712", number = "4-5", pages = "351-369", doi = "10.1016/j.physletb.2012.05.022" }
Aad, G., Borjanović, I., Božović-Jelisavčić, I., Agatonović-Jovin, T., Krstić, J., Mamužić, J., Mudrinić, M., Popović, D. S., Sijacki, Dj., Simić, Lj., Vranješ, N., Vranješ Milosavljević, M.,& Živković, L.. (2012). Search for FCNC single top-quark production at root s=7 TeV with the ATLAS detector. in Physics Letters B, 712(4-5), 351-369. https://doi.org/10.1016/j.physletb.2012.05.022
Aad G, Borjanović I, Božović-Jelisavčić I, Agatonović-Jovin T, Krstić J, Mamužić J, Mudrinić M, Popović DS, Sijacki D, Simić L, Vranješ N, Vranješ Milosavljević M, Živković L. Search for FCNC single top-quark production at root s=7 TeV with the ATLAS detector. in Physics Letters B. 2012;712(4-5):351-369. doi:10.1016/j.physletb.2012.05.022 .
Aad, G., Borjanović, Iris, Božović-Jelisavčić, Ivanka, Agatonović-Jovin, Tatjana, Krstić, Jelena, Mamužić, Judita, Mudrinić, Mihajlo, Popović, D. S., Sijacki, Dj., Simić, Lj., Vranješ, Nenad, Vranješ Milosavljević, Marija, Živković, Lada, "Search for FCNC single top-quark production at root s=7 TeV with the ATLAS detector" in Physics Letters B, 712, no. 4-5 (2012):351-369, https://doi.org/10.1016/j.physletb.2012.05.022 . .