publication . Article . Other literature type . Preprint . 2018

Combined Forward-Backward Asymmetry Measurements in Top-Antitop Quark Production at the Tevatron

Aaltonen, Timo Antero; Abazov, Victor Mukhamedovich; Abbott, Braden Keim; Acharya, Bannanje Sripath; Adams, Mark Raymond; Adams, Todd; Agnew, James P; Alexeev, Guennadi D; Alkhazov, Georgiy D; Alton, Andrew K; ...
Open Access English
  • Published: 24 Jan 2018
  • Publisher: HAL CCSD
Abstract
The CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use the full data sets collected in proton-antiproton collisions at a center-of-mass energy of $\sqrt s =1.96$ TeV. We report the results of combinations of the inclusive asymmetries and their differential dependencies on relevant kinematic quantities. The combined inclusive asymmetry is $A_{\mathrm{FB}}^{t\bar{t}} = 0.128 \pm 0.025$. The combined inclusive and differential asymmetries are consistent with recent s...
Subjects
arXiv: High Energy Physics::ExperimentHigh Energy Physics::Phenomenology
free text keywords: Physics, Physik, Subatomic Physics, Subatomär fysik, colliding beams [anti-p p], asymmetry [angular distribution], difference [rapidity], pair production [top], scattering [anti-p p], CDF Collaboration, D0 Collaboration, hep-ex, General Physics, Physical Sciences, Mathematical Sciences, Engineering, Physics Institute, 530 Physics, 1960 GeV-cms, experimental results, CDF, DZERO, kinematics, Batavia TEVATRON Coll, anti-p p: scattering, top: pair production, angular distribution: asymmetry, anti-p p: colliding beams, Q007TFB, rapidity: difference, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Hadron-hadron interactions, Hypothetical particle physics models, Particle production, Quantum chromodynamics, Top quark, 114 Physical sciences, 550, 物理学, High Energy Physics - Experiment, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (all), Science & Technology, Physics, Multidisciplinary, 02 Physical Sciences, ddc:500.2, ddc:530, ddc:550
Funded by
EC| TAUKITFORNEWPHYSICS
Project
TAUKITFORNEWPHYSICS
Tau Toolkit for opening the New Physics Window at LHC and possible spin off effects
  • Funder: European Commission (EC)
  • Project Code: 302103
  • Funding stream: FP7 | SP3 | PEOPLE
,
NSERC
Project
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
Communities
EGI FederationEGI virtual organizations: cdf
31 references, page 1 of 3

[1] M. Czakon, P. Fiedler, D. Heymes, and A. Mitov, NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron, J. High Energy Phys. 05 (2016) 034.

[2] M. Czakon, P. Fiedler, and A. Mitov, Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation, Phys. Rev. Lett. 115, 052001 (2015). [OpenAIRE]

[3] W. Bernreuther and Z.-G. Si, Top quark and leptonic charge asymmetries for the Tevatron and LHC, Phys. Rev. D 86, 034026 (2012). [OpenAIRE]

[4] N. Kidonakis, The top quark forward-backward asymmetry at approximate N3LO, Phys. Rev. D 91, 071502(R) (2015). [OpenAIRE]

[5] S.-Q. Wang, X.-G. Wu, Z.-G. Si, and S. J. Brodsky, Report No. SLAC-PUB-16934(to be published), arXiv:1703.03583.

[6] S. Frixione and B. R. Webber, Matching NLO QCD computations and parton shower simulations, J. High Energy Phys. 06 (2002) 029; S. Frixione, P. Nason, and B. R. Webber, Matching NLO QCD and parton showers in heavy flavour production, J. High Energy Phys. 08 (2003) 007.

[7] J. F. Kamenik, J. Shu, and J. Zupan, Review of new physics effects in tt¯ production, Eur. Phys. J. C 72, 2102 (2012); See, also, Refs. [3-83] of E. L. Berger, Q.-H. Cao, C.-R. Chen, and H. Zhang, Interpretations and implications of the top quark rapidity asymmetries AtFt¯B and AFlB, Phys. Rev. D 88, 014033 (2013).

[8] T. Aaltonen et al. (CDF Collaboration), Evidence for a mass dependent forward-backward asymmetry in top quark pair production, Phys. Rev. D 83, 112003 (2011).

[9] V. M. Abazov et al. (D0 Collaboration), Forward-backward asymmetry in top quark-antiquark production, Phys. Rev. D 84, 112005 (2011).

[10] D. Acosta et al. (CDF Collaboration), Measurement of the J=ψ meson and b-hadron production cross sections in pp¯ collisions at pffisffi ¼ 1960 GeV, Phys. Rev. D 71, 032001 (2005).

[11] V. M. Abazov et al. (D0 Collaboration), The upgraded D0 detector, Nucl. Instrum. Methods Phys. Res., Sect. A 565, 463 (2006).

[12] T. Aaltonen et al. (CDF Collaboration), Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties, Phys. Rev. D 87, 092002 (2013).

[13] V. M. Abazov et al. (D0 Collaboration), Measurement of the forward-backward asymmetry in top quark-antiquark production in pp¯ collisions using the lepton þ jets channel, Phys. Rev. D 90, 072011 (2014).

[14] T. Aaltonen et al. (CDF Collaboration), Measurement of the forward-backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set, Phys. Rev. D 93, 112005 (2016).

[15] V. M. Abazov et al. (D0 Collaboration), Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt¯ production at the Tevatron, Phys. Rev. D 92, 052007 (2015).

31 references, page 1 of 3
Abstract
The CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use the full data sets collected in proton-antiproton collisions at a center-of-mass energy of $\sqrt s =1.96$ TeV. We report the results of combinations of the inclusive asymmetries and their differential dependencies on relevant kinematic quantities. The combined inclusive asymmetry is $A_{\mathrm{FB}}^{t\bar{t}} = 0.128 \pm 0.025$. The combined inclusive and differential asymmetries are consistent with recent s...
Subjects
arXiv: High Energy Physics::ExperimentHigh Energy Physics::Phenomenology
free text keywords: Physics, Physik, Subatomic Physics, Subatomär fysik, colliding beams [anti-p p], asymmetry [angular distribution], difference [rapidity], pair production [top], scattering [anti-p p], CDF Collaboration, D0 Collaboration, hep-ex, General Physics, Physical Sciences, Mathematical Sciences, Engineering, Physics Institute, 530 Physics, 1960 GeV-cms, experimental results, CDF, DZERO, kinematics, Batavia TEVATRON Coll, anti-p p: scattering, top: pair production, angular distribution: asymmetry, anti-p p: colliding beams, Q007TFB, rapidity: difference, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Hadron-hadron interactions, Hypothetical particle physics models, Particle production, Quantum chromodynamics, Top quark, 114 Physical sciences, 550, 物理学, High Energy Physics - Experiment, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (all), Science & Technology, Physics, Multidisciplinary, 02 Physical Sciences, ddc:500.2, ddc:530, ddc:550
Funded by
EC| TAUKITFORNEWPHYSICS
Project
TAUKITFORNEWPHYSICS
Tau Toolkit for opening the New Physics Window at LHC and possible spin off effects
  • Funder: European Commission (EC)
  • Project Code: 302103
  • Funding stream: FP7 | SP3 | PEOPLE
,
NSERC
Project
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
Communities
EGI FederationEGI virtual organizations: cdf
31 references, page 1 of 3

[1] M. Czakon, P. Fiedler, D. Heymes, and A. Mitov, NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron, J. High Energy Phys. 05 (2016) 034.

[2] M. Czakon, P. Fiedler, and A. Mitov, Resolving the Tevatron Top Quark Forward-Backward Asymmetry Puzzle: Fully Differential Next-to-Next-to-Leading-Order Calculation, Phys. Rev. Lett. 115, 052001 (2015). [OpenAIRE]

[3] W. Bernreuther and Z.-G. Si, Top quark and leptonic charge asymmetries for the Tevatron and LHC, Phys. Rev. D 86, 034026 (2012). [OpenAIRE]

[4] N. Kidonakis, The top quark forward-backward asymmetry at approximate N3LO, Phys. Rev. D 91, 071502(R) (2015). [OpenAIRE]

[5] S.-Q. Wang, X.-G. Wu, Z.-G. Si, and S. J. Brodsky, Report No. SLAC-PUB-16934(to be published), arXiv:1703.03583.

[6] S. Frixione and B. R. Webber, Matching NLO QCD computations and parton shower simulations, J. High Energy Phys. 06 (2002) 029; S. Frixione, P. Nason, and B. R. Webber, Matching NLO QCD and parton showers in heavy flavour production, J. High Energy Phys. 08 (2003) 007.

[7] J. F. Kamenik, J. Shu, and J. Zupan, Review of new physics effects in tt¯ production, Eur. Phys. J. C 72, 2102 (2012); See, also, Refs. [3-83] of E. L. Berger, Q.-H. Cao, C.-R. Chen, and H. Zhang, Interpretations and implications of the top quark rapidity asymmetries AtFt¯B and AFlB, Phys. Rev. D 88, 014033 (2013).

[8] T. Aaltonen et al. (CDF Collaboration), Evidence for a mass dependent forward-backward asymmetry in top quark pair production, Phys. Rev. D 83, 112003 (2011).

[9] V. M. Abazov et al. (D0 Collaboration), Forward-backward asymmetry in top quark-antiquark production, Phys. Rev. D 84, 112005 (2011).

[10] D. Acosta et al. (CDF Collaboration), Measurement of the J=ψ meson and b-hadron production cross sections in pp¯ collisions at pffisffi ¼ 1960 GeV, Phys. Rev. D 71, 032001 (2005).

[11] V. M. Abazov et al. (D0 Collaboration), The upgraded D0 detector, Nucl. Instrum. Methods Phys. Res., Sect. A 565, 463 (2006).

[12] T. Aaltonen et al. (CDF Collaboration), Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties, Phys. Rev. D 87, 092002 (2013).

[13] V. M. Abazov et al. (D0 Collaboration), Measurement of the forward-backward asymmetry in top quark-antiquark production in pp¯ collisions using the lepton þ jets channel, Phys. Rev. D 90, 072011 (2014).

[14] T. Aaltonen et al. (CDF Collaboration), Measurement of the forward-backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set, Phys. Rev. D 93, 112005 (2016).

[15] V. M. Abazov et al. (D0 Collaboration), Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt¯ production at the Tevatron, Phys. Rev. D 92, 052007 (2015).

31 references, page 1 of 3
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