We present a measurement of top quark polarization in t ¯ t pair production in p ¯ p collisions at √ s = 1.96 TeV using data corresponding to 9.7 fb -1 of integrated luminosity recorded with the D0 detector at the Fermilab Tevatron Collider. We consider final states containing a lepton and at least three jets. The polarization is measured through the distribution of lepton angles along three axes: the beam axis, the helicity axis, and the transverse axis normal to the t ¯ t production plane. This is the first measurement of top quark polarization at the Tevatron using lepton + jet final states and the first measurement of the transverse polarization in t ¯ t production. The observed distributions are consistent with standard model predictions of nearly no polarization.
Abazov, V. M., et al. "Measurement of top quark polarization in <math display='inline'><mrow><mi>t</mi><mover accent='true'><mrow><mi>t</mi></mrow><mrow><mo stretchy='true'>¯</mo></mrow></mover></mrow></math> <math display='inline'><mrow><mi>lepton</mi><mtext mathvariant='bold'>+</mtext><mtext mathvariant='bold'>jets</mtext></mrow></math> final states." Physical Review D, vol. 95, no. 1, Jan. 2017. https://doi.org/10.1103/PhysRevD.95.011101
Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Agnew, J. P., Alexeev, G. D., Alkhazov, G., Alton, A., Askew, A., Atkins, S., Augsten, K., Aushev, V., Aushev, Y., Avila, C., Badaud, F., Bagby, L., Baldin, B., ... Zivkovic, L. (2017). Measurement of top quark polarization in <math display='inline'><mrow><mi>t</mi><mover accent='true'><mrow><mi>t</mi></mrow><mrow><mo stretchy='true'>¯</mo></mrow></mover></mrow></math> <math display='inline'><mrow><mi>lepton</mi><mtext mathvariant='bold'>+</mtext><mtext mathvariant='bold'>jets</mtext></mrow></math> final states. Physical Review D, 95(1). https://doi.org/10.1103/PhysRevD.95.011101
Abazov, V. M., Abbott, B., Acharya, B. S., et al., "Measurement of top quark polarization in <math display='inline'><mrow><mi>t</mi><mover accent='true'><mrow><mi>t</mi></mrow><mrow><mo stretchy='true'>¯</mo></mrow></mover></mrow></math> <math display='inline'><mrow><mi>lepton</mi><mtext mathvariant='bold'>+</mtext><mtext mathvariant='bold'>jets</mtext></mrow></math> final states," Physical Review D 95, no. 1 (2017), https://doi.org/10.1103/PhysRevD.95.011101
@article{osti_1345757,
author = {Abazov, V. M. and Abbott, B. and Acharya, B. S. and Adams, M. and Adams, T. and Agnew, J. P. and Alexeev, G. D. and Alkhazov, G. and Alton, A. and Askew, A. and others},
title = {Measurement of top quark polarization in <math display='inline'><mrow><mi>t</mi><mover accent='true'><mrow><mi>t</mi></mrow><mrow><mo stretchy='true'>¯</mo></mrow></mover></mrow></math> <math display='inline'><mrow><mi>lepton</mi><mtext mathvariant='bold'>+</mtext><mtext mathvariant='bold'>jets</mtext></mrow></math> final states},
annote = {We present a measurement of top quark polarization in t ¯ t pair production in p ¯ p collisions at √ s = 1.96 TeV using data corresponding to 9.7 fb -1 of integrated luminosity recorded with the D0 detector at the Fermilab Tevatron Collider. We consider final states containing a lepton and at least three jets. The polarization is measured through the distribution of lepton angles along three axes: the beam axis, the helicity axis, and the transverse axis normal to the t ¯ t production plane. This is the first measurement of top quark polarization at the Tevatron using lepton + jet final states and the first measurement of the transverse polarization in t ¯ t production. The observed distributions are consistent with standard model predictions of nearly no polarization.},
doi = {10.1103/PhysRevD.95.011101},
url = {https://www.osti.gov/biblio/1345757},
journal = {Physical Review D},
issn = {ISSN 2470-0010},
number = {1},
volume = {95},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2017},
month = {01}}
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