Search for Top-Quark Production via Flavor-Changing Neutral Currents in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:math>Jet Events at CDF

Aaltonen, T.; Adelman, J.; Akimoto, T.; González, B. Álvarez; Amerio, S.; Amidei, D.; Anastassov, A.; Annovi, A.; Antos̆, J.; Apollinari, G.; Apresyan, A.; Arisawa, T.; Artikov, A.; Ashmanskas, W.; Attal, A.; Aurisano, A.; Azfar, F.; Azzurri, P.; Badgett, W.; Barbaro‐Galtieri, A.; Barnes, V. E.; Barnett, B. A.; Bartsch, V.; Bauer, G.; Beauchemin, P. H.; Bedeschi, F.; Beecher, D.; Behari, S.; Bellettini, G.; Bellinger, J.; Benjamin, D.; Beretvas, A.; Beringer, J.; Bhatti, A.; Binkley, M.; Bisello, D.; Bizjak, I.; Blair, R. E.; Blocker, C.; Blumenfeld, B.; Bocci, A.; Bodek, A.; Boisvert, V.; Bolla, G.; Bortoletto, D.; Boudreau, J.; Boveia, A.; Brau, B.; Bridgeman, A.; Brigliadori, L.; Bromberg, C.; Brubaker, E.; Budagov, J.; Budd, H. S.; Budd, S.; Bürke, S.; Burkett, K.; Busetto, G.; Bussey, P.; Buzatu, A.; Byrum, K. 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doi:10.1103/physrevlett.102.151801

Cited by 56 publications

(17 citation statements)

References 30 publications

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“…B(t → qZ) < 3.7% at 95% confidence level [64], using the 1.9 fb −1 of the data, B(t → u + g) < 3.9 × 10 −4 and B(t → c + g) < 5.7 × 10 −3 [65], using the 2.2 fb −1 of the data.…”

Section: Flavor Changing Neutral Currentsmentioning

confidence: 99%

Study of the top quark electric charge at the CDF experiment

Bartoš

2011

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AcknowledgementsFirst of all I would like to express my great thanks to my supervisor doc. RNDr.Stanislav Tokár, CSc. for his support. He advised me to became a part of the CDF collaboration at Fermilab, where I met a lot of excellent physicists. He always had time to answer my questions, helped me to understand the present high energy physics as well as discussed with me any analysis result or any problem -physical or technical -that I met during my study.My special thanks belongs to Veronica Sorin for her guiding me trough the analysis, she has taught me how to negotiate the problems by a further studies. Her enthusiasm for the work inspired me.I want to thanks also to other members of the top charge group -Veronique Boisvert, Yen-Chu Chen, Andy Beretvas, Jaroslav Antos, from whom I learned many things trough the discussions on our weekly meetings. Kl 'úč ové slová: náboj top kvarku, experiment CDF, váhovanie náboja trekov, b-jet. AbstractWe report on the measurement of the top quark electric charge using the jet charge of data, that the p-value under the standard model hypothesis is equal to 13.4%, while the p-value under the exotic model hypothesis is equal to 0.014%. Using the a priori criteria generally accepted by the CDF collaboration, we can say that the result is consistent with the standard model, while we exclude an exotic quark hypothesis with 95% confidence. Using the Bayesian approach, we obtain for the Bayes factor (2ln(BF )) a value of 19.6, that favors very strongly the SM hypothesis over the XM one. The presented method has the highest sensitivity to the top quark electric charge among the presented so far top quark charge analysis.

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Section: Flavor Changing Neutral Currentsmentioning

confidence: 99%

Study of the top quark electric charge at the CDF experiment

Bartoš

2011

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“…At the LHC t → qH has also been searched for [21][22][23][24][25][26][27][28][29][30]. Direct top production, pp → t, has been considered at the Tevatron by CDF [31] and at the LHC by ATLAS [32][33][34], while a similar production with an additional jet in the final state has been considered by D0 [35,36] and CMS [37]. Single top production in association with a photon and a Z have been searched by CMS [38] and ATLAS [39].…”

Section: Introductionmentioning

confidence: 99%

Probing the top quark flavor-changing couplings at CEPC *

Shi

Zhang

2019

Chinese Phys. C

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We propose to study the flavor properties of the top quark at the future Circular Electron Positron Collider (CEPC) in China. We systematically consider the full set of 56 real parameters that characterize the flavorchanging neutral interactions of the top quark, which can be tested at the CEPC by the single top production channel. Compared with current bounds from the LEP2 data and the projected limits at the high-luminosity LHC, we find that the CEPC could improve the limits on four-fermion flavor-changing coefficients by one to two orders of magnitude, and in the meantime providing similar sensitivities on two-fermion flavor-changing coefficients. Overall, the CEPC could explore a large fraction of currently allowed parameter space that will not be covered by the upgrade of the LHC. We show that the c-jet tagging capacity at the CEPC could further improve its sensitivity to top-charm flavor-changing couplings. If a signal is observed, the kinematic distribution as well as the c-jet tagging could be exploited to pinpoint the sizes of various flavor-changing couplings, providing valuable information on the flavor properties of the top quark.

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“…Beyond the SM scenarios like technicolor, SUSY models, two-Higgs doublet models predict much higher branching fractions of the order of ∼ 10 −10 to 10 −6 which are larger than the SM values [42,[44][45][46][47][48][49][50][51]. Searches for FCNC in the top quark sector have been followed by various experiments in the past years, including ALEPH, DELPHI, L3 and OPAL experiments at LEP [52][53][54][55], H1 and ZEUS experiments at HERA [56][57][58][59][60], CDF and D0 experiments at the Tevatron [61][62][63][64][65], and CMS and ATLAS experiments at the LHC.…”

Section: Introductionmentioning

confidence: 99%

Constraining top quark flavor violation and dipole moments through three and four top quark productions at the LHC

et al. 2018

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In this paper, we examine the sensitivity of the three-top quark production at the LHC to the top quark flavor-changing neutral currents (FCNC) as well as the sensitivity of the four-top production to the strong and weak dipole moments of the top quark. Upper limits at 95% CL on the branching fractions of B(t → qX), where X = g, Z, γ, H and q = u, c, are set by performing an analysis on three-top events in the same-sign dilepton channel. We consider the main sources of the background processes and a realistic detector simulation is performed at the center-of-mass energy of 14 TeV. In the second part of this work, based on the recent upper limits which have been set on the four-top quark cross section by the ATLAS and CMS collaborations from 13 TeV data, we constrain the top quark strong and weak dipole moments. The bounds on the top quark dipole moments are presented using the future LHC prospects for four-top quark cross section measurement. * M_Malekhosseini@semnan.ac.ir † Mghominejad@semnan.ac.ir ‡ Hamzeh.Khanpour@mail.ipm.ir § Mojtaba@cern.ch arXiv:1804.05598v2 [hep-ph]

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Search for Top-Quark Production via Flavor-Changing Neutral Currents inW+1Jet Events at CDF

Cited by 56 publications

References 30 publications

Study of the top quark electric charge at the CDF experiment

Study of the top quark electric charge at the CDF experiment

Probing the top quark flavor-changing couplings at CEPC *

Constraining top quark flavor violation and dipole moments through three and four top quark productions at the LHC

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