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Angular distribution of thrust axis with power-suppressed contribution in e + e − annihilation

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Abstract

Structure function of e + e − → hadrons cross section proportional to the longitudinal part of the hadron tensor is power suppressed with respect to an event shape variable in the two-jet region. In the SCET framework, we study the event shape distribution for this structure function to NLL level of accuracy. As, a result we obtain the angular distribution of hadron jets as a function of the thrust, in the two jet region. We further examine effects of non-perturbative hadronization corrections by adopting a shape function that reproduce the observed event shape distributions. Impacts of our findings on the electroweak measurements via the jet angular forward-backward asymmetry are discussed.

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Authors and Affiliations

  1. KEK Theory Center, Tsukuba, 305-0801, Japan

    Kaoru Hagiwara & Grisha Kirilin

  2. Sokendai, Tsukuba, 305-0801, Japan

    Kaoru Hagiwara

  3. Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russia

    Grisha Kirilin

Authors
  1. Kaoru Hagiwara
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  2. Grisha Kirilin
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Correspondence to Grisha Kirilin.

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Hagiwara, K., Kirilin, G. Angular distribution of thrust axis with power-suppressed contribution in e + e − annihilation. J. High Energ. Phys. 2010, 93 (2010). https://doi.org/10.1007/JHEP10(2010)093

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  • DOI: https://doi.org/10.1007/JHEP10(2010)093

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