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A new quantity for studies of dijet azimuthal decorrelations

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Abstract

We introduce a new measurable quantity, R Δϕ , for studies of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations in hadron-hadron collisions. In pQCD, R Δϕ is computed as a ratio of three-jet and dijet cross sections in which the parton distribution functions cancel to a large extent. At the leading order, R Δϕ is proportional to αs, and the transverse momentum dependence of R Δϕ can therefore be exploited to determine αs. We compute the NLO pQCD theory predictions and non-perturbative corrections for R Δϕ at the LHC and the Tevatron and investigate the corresponding uncertainties. From this, we estimate the theory uncertainties for αs determinations based on R Δϕ at both colliders. The potential of R Δϕ measurements for tuning Monte Carlo event generators is also demonstrated.

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Authors and Affiliations

  1. Department of Physics, Louisiana Tech University, 600 West Arizona Ave., Ruston, U.S.A.

    M. Wobisch, K. Chakravarthula, R. Dhullipudi, L. Sawyer & M. Tamsett

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  1. M. Wobisch
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  2. K. Chakravarthula
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  3. R. Dhullipudi
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  4. L. Sawyer
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  5. M. Tamsett
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Correspondence to M. Wobisch.

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ArXiv ePrint: 1211.6773

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Wobisch, M., Chakravarthula, K., Dhullipudi, R. et al. A new quantity for studies of dijet azimuthal decorrelations. J. High Energ. Phys. 2013, 172 (2013). https://doi.org/10.1007/JHEP01(2013)172

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  • DOI: https://doi.org/10.1007/JHEP01(2013)172

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