Journal of High Energy Physics

, 2019:285 | Cite as

Fracture functions in different kinematic regions and their factorizations

  • X. P. Chai
  • K. B. Chen
  • J. P. MaEmail author
  • X. B. Tong
Open Access
Regular Article - Theoretical Physics


Fracture functions are parton distributions of an initial hadron in the presence of an almost collinear particle observed in the final state. They are important ingredients in QCD factorization for processes where a particle is produced diffractively. There are different fracture functions for a process in different kinematic regions. We take the production of a lepton pair combined with a diffractively produced particle in hadron collisions to discuss this. Those fracture functions can be factorized further if there are large energy scales involved. We perform one-loop calculations to illustrate the factorization in the case with the diffractively produced particle as a real photon. Evolution equations of different fracture functions are derived from our explicit calculations. They agree with expectations. These equations can be used for resummations of large log terms in perturbative expansions.


Perturbative QCD Resummation 


Open Access

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  • X. P. Chai
    • 1
    • 2
  • K. B. Chen
    • 1
    • 2
  • J. P. Ma
    • 1
    • 2
    • 3
    Email author
  • X. B. Tong
    • 1
    • 2
  1. 1.Institute of Theoretical PhysicsChinese Academy of SciencesBeijingChina
  2. 2.School of Physical SciencesUniversity of Chinese Academy of SciencesBeijingChina
  3. 3.School of Physics and Center for High-Energy PhysicsPeking UniversityBeijingChina

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