Scholars@Duke

Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties

Publication ,  Journal Article
Aaltonen, T; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Appel, JA; Arisawa, T; Artikov, A; Asaadi, J; Azfar, F ...
Published in: Physical Review D Particles Fields Gravitation and Cosmology
May 3, 2013
Published version (DOI)

We present new measurements of the inclusive forward-backward tt̄ production asymmetry, AFB, and its dependence on several properties of the tt̄ system. The measurements are performed with the full Tevatron data set recorded with the CDF II detector during pp̄ collisions at √s=1.96 TeV, corresponding to an integrated luminosity of 9.4 fb -1. We measure the asymmetry using the rapidity difference Δy=yt-yt̄. Parton-level results are derived, yielding an inclusive asymmetry of 0.164±0.047(stat+syst). We establish an approximately linear dependence of AFB on the top-quark pair mass Mtt̄ and the rapidity difference |Δy| at detector and parton levels. Assuming the standard model, the probabilities to observe the measured values or larger for the detector-level dependencies are 7.4×10-3 and 2.2×10-3 for Mtt̄ and |Δy| respectively. Lastly, we study the dependence of the asymmetry on the transverse momentum of the tt̄ system at the detector level. These results are consistent with previous lower-precision measurements and provide additional quantification of the functional dependencies of the asymmetry. © 2013 American Physical Society.

Duke Scholars

Alfred T. Goshaw
Author Alfred T. Goshaw Physics
Ashutosh V. Kotwal
Author Ashutosh V. Kotwal Physics
Mark C. Kruse
Author Mark C. Kruse Physics
Seog Oh
Author Seog Oh Physics

Published In

Physical Review D Particles Fields Gravitation and Cosmology

DOI

10.1103/PhysRevD.87.092002

EISSN

1550-2368

ISSN

1550-7998

Publication Date

May 3, 2013

Volume

87

Issue

9

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
 

Citation

APA
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ICMJE
MLA
NLM
Aaltonen, T., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., … Elagin, A. (2013). Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties. Physical Review D Particles Fields Gravitation and Cosmology, 87(9). https://doi.org/10.1103/PhysRevD.87.092002
Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties.” Physical Review D Particles Fields Gravitation and Cosmology 87, no. 9 (May 3, 2013). https://doi.org/10.1103/PhysRevD.87.092002.
Aaltonen T, Amerio S, Amidei D, Anastassov A, Annovi A, Antos J, et al. Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties. Physical Review D Particles Fields Gravitation and Cosmology. 2013 May 3;87(9).
Aaltonen, T., et al. “Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties.” Physical Review D Particles Fields Gravitation and Cosmology, vol. 87, no. 9, May 2013. Scopus, doi:10.1103/PhysRevD.87.092002.
Aaltonen T, Amerio S, Amidei D, Anastassov A, Annovi A, Antos J, Apollinari G, Appel JA, Arisawa T, Artikov A, Asaadi J, Ashmanskas W, Auerbach B, Aurisano A, Azfar F, Badgett W, Bae T, Barbaro-Galtieri A, Barnes VE, Barnett BA, Barria P, Bartos P, Bauce M, Bedeschi F, Behari S, Bellettini G, Bellinger J, Benjamin D, Beretvas A, Bhatti A, Bland KR, Blumenfeld B, Bocci A, Bodek A, Bortoletto D, Boudreau J, Boveia A, Brigliadori L, Bromberg C, Brucken E, Budagov J, Budd HS, Burkett K, Busetto G, Bussey P, Butti P, Buzatu A, Calamba A, Camarda S, Campanelli M, Canelli F, Carls B, Carlsmith D, Carosi R, Carrillo S, Casal B, Casarsa M, Castro A, Catastini P, Cauz D, Cavaliere V, Cavalli-Sforza M, Cerri A, Cerrito L, Chen YC, Chertok M, Chiarelli G, Chlachidze G, Cho K, Chokheli D, Ciocci MA, Clark A, Clarke C, Convery ME, Conway J, Corbo M, Cordelli M, Cox CA, Cox DJ, Cremonesi M, Cruz D, Cuevas J, Culbertson R, D’Ascenzo N, Datta M, De Barbaro P, Demortier L, Deninno M, Devoto F, D’Errico M, Di Canto A, Di Ruzza B, Dittmann JR, D’Onofrio M, Donati S, Dorigo M, Driutti A, Ebina K, Edgar R, Elagin A. Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties. Physical Review D Particles Fields Gravitation and Cosmology. 2013 May 3;87(9).

Published In

Physical Review D Particles Fields Gravitation and Cosmology

DOI

10.1103/PhysRevD.87.092002

EISSN

1550-2368

ISSN

1550-7998

Publication Date

May 3, 2013

Volume

87

Issue

9

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics