The top quark chromomagnetic dipole moment in the SM

Authors

DOI:

https://doi.org/10.31349/SuplRevMexFis.4.021122

Keywords:

Quantum chromodynamics, Electric and magnetic moments, Top quark, Gluons

Abstract

We present our results on the top quark chromomagnetic dipole moment, which is based on the 5-dimension effective Lagrangian operator that characterizes the chromodipolar vertex functions gtt and ggtt. The chromomagnetic dipole mu_t is derived via quantum fluctuation at the 1-loop level. We evaluate µˆt(s) as a function of the energy scale s=+-E2, for E=[10,1000] GeV. In particular we focus on the conventional high-energy scale E=mZ, analogously as with alphas(mZ2) and sW(mZ2). The spacelike evaluation matches quite well with the experimental central value, while the timelike case deviates from it.

References

I.D. Choudhury and A. Lahiri, Anomalous chromomagnetic moment of quarks, Mod. Phys. Lett. A 30 (2015) 1550113, https://doi.org/10.1142/S0217732315501138

J. I. Aranda, D. Espinosa-Gómez, J. Montaño, B. Quezadas-Vivian, F. Ramírez-Zavaleta and E. S. Tututi, Flavor violation in chromo- and electromagnetic dipole moments induced by Z’gauge bosons and a brief revisit of the Standard Model, Phys. Rev. D 98 (2018) 116003, https://doi.org/10.1103/PhysRevD.98.116003

J. I. Aranda, T. Cisneros-Pérez, J. Montaño, B. Quezadas-Vivian, F. Ramírez-Zavaleta and E. S. Tututi, Revisiting the top quark chromomagnetic dipole moment in the SM, Eur. Phys. J. Plus 136 (2021) 164, https://doi.org/10.1140/epjp/s13360-021-01102-x

A. I. Hernández-Juárez, A. Moyotl and G. Tavares-Velasco, New estimate of the chromomagnetic dipole moment of quarks in the standard model, Eur. Phys. J. Plus 136 (2021) 262, https://doi.org/10.1140/epjp/s13360-021-01239-9

A. M. Sirunyan et al., Measurement of the top quark forwardbackward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √ s = 13 TeV, JHEP 2020 (2020) 146, https://doi.org/10.1007/JHEP06(2020)146

R. L. Workman et al. [Particle Data Group], Review of Particle Physics, PTEP 2022 (2022) 083C01, https://doi.org/10.1093/ptep/ptac097

R. D. Field, Applications of Perturbative QCD, Front. Phys. 77 (1989) 1

A. Deur, S. J. Brodsky and G. F. de Téramond, The QCD Running Coupling, Pro. Part. Nucl. Phys. 90 (2016) 1, https://doi.org/10.1016/j.ppnp.2016.04.003

F. J. Ynduráin, The Theory of Quark and Gluon Interactions, (Springer-Verlag, 2006), https://doi.org/10.1007/3-540-33210-3

A. V. Nesterenko, Strong interactions in spacelike and tiemlike domains: dispersive approach (Elsevier, 2016)

D. d’Enterria et al., The strong coupling constant: State of the art and the decade ahead, (2022), https://doi.org/10.48550/arXiv.2203.08271

P. Haberl, O. Nachtmann and A. Wilch, Top-quark production in hadron-hadron collisions and anomalous top-quark-gluon couplings, Phys. Rev. D 53 (1996) 4875, https://doi.org/10.1103/PhysRevD.53.4875

J. Montano-Dominguez et al., The top quark chromomagnetic dipole moment in the SM from the four-body vertex (2021), https://doi.org/10.48550/arXiv.2110.14125

W. Bernreuther and Z. G. Si, Top quark spin correlations and polarization at the LHC: standard model predictions and effects of anomalous top chromo moments, Phys. Lett. B 725 (2013) 115, [erratum: Phys. Lett. B 744 (2015) 413-413] https://doi.org/10.1016/j.physletb.2013.06.051

V. Khachatryan et al. [CMS], Measurements of tt¯-spin correlations and top quark polarization using dilepton final states in pp collisions at √ s = 8 TeV, Phys. Rev. D 93 (2016) 052007, https://doi.org/10.1103/PhysRevD.93. 052007

A. Czarnecki and B. Krause, Neutron Electric Dipole Moment in the Standard Model: Complete Three-Loop Calculation of the Valence Quark Contributions, Phys. Rev. Lett. 78 (1997) 4339, https://doi.org/10.1103/PhysRevLett.78.4339

B. L. Roberts and W. J. Marciano, Lepton dipole oments, Adv. Ser. Direct. High Energy Phys. 20 (2009) 1, (WORLD SCIENTIFIC, 2009), https://doi.org/10.1142/7273

F. Jegerlehner, The Anomalous Magnetic Moment of the Muon, Springer, 2017, Springer Tracts Mod. Phys. 274 (2017) 1, https://doi.org/10.1007/978-3-319-63577-4

J. S. Schwinger, On Quantum electrodynamics and the magnetic moment of the electron, Phys. Rev. 73 (1948) 416, https://doi.org/10.1103/PhysRev.73.416

J. S. Schwinger, Quantum electrodynamics. III: The electromagnetic properties of the electron: Radiative corrections to scattering, Phys. Rev. 76 (1949) 790, https://doi.org/10.1103/PhysRev.76.790

H. H. Patel, Package-X: A Mathematica package for the analytic calculation of one-loop integrals, Comput. Phys. Commun. 197 (2015) 276, https://doi.org/10.1016/j.cpc.2015.08.017

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Published

2023-09-18

How to Cite

1.
Montaño-Domínguez J, Ramírez-Zavaleta FI, Tututi ES, Urquiza-Trejo E. The top quark chromomagnetic dipole moment in the SM. Supl. Rev. Mex. Fis. [Internet]. 2023 Sep. 18 [cited 2024 May 2];4(2):021122 1-5. Available from: https://rmf.smf.mx/ojs/index.php/rmf-s/article/view/7123

Issue

Vol. 4 No. 2 (2023): Suplemento de la Revista Mexicana de Física. XVIII Mexican Workshop on Particles and Fields 2022 and XXXVI Annual Meeting of the Division of Particles and Fields 2022

Section

11 XVIII Mexican Workshop on Particles and Fields 2022 and XXXVI Annual Meeting

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Copyright (c) 2023 Javier Montaño-Domínguez, Fernando I. Ramírez-Zavaleta, Eduardo S. Tututi, Everardo Urquiza-Trejo

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