First measurement of the forward-backward asymmetry in bottom-quark pair production at high mass
Journal Article
·
· Physical Review. D, Particles, Fields, Gravitation and Cosmology
We measure the particle-level forward-backward production asymmetry in $$\mathrm{b\bar{b}}$$ pairs with masses (m$$\mathrm{b\bar{b}}$$) larger than 150 GeV/c2, using events with hadronic jets and employing jet charge to distinguish b from $$\bar{b}$$. The measurement uses 9.5 fb-1 of $$\mathrm{p\bar{p}}$$ collisions at a center-of-mass energy of 1.96 TeV recorded by the CDF II detector. The asymmetry as a function of m$$\mathrm{b\bar{b}}$$ is consistent with zero, as well as with the predictions of the standard model. The measurement disfavors a simple model including an axigluon with a mass of 200 GeV/c2, whereas a model containing a heavier 345 GeV/c2 axigluon is not excluded.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CDF Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1212125
- Alternate ID(s):
- OSTI ID: 1212762
- Report Number(s):
- FERMILAB-PUB-15-153-E; PRVDAQ; 032006
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Vol. 92 Journal Issue: 3; ISSN 1550-7998
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 4 works
Citation information provided by
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