The phase space analysis for three and four massive particles in final states

Oct, 2012
8 pages
Published in:
  • Phys.Rev.D 86 (2012) 114023
e-Print:

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Abstract: (arXiv)
We propose formulae for computing the phase space integrals of 131\to 3 and 141\to 4 processes with massive particles in final states. As an application of these formulae we study the final state mass effects in some interesting phenomenological cases, giving fully integrated analytic results for the corresponding phase spaces. We consider also the BsBˉsB_s-\bar{B}_s process at NNLO and calculate one of the most complicated master integrals, which contributes to the ΔΓBs\Delta\Gamma_{B_s} at O(αs2)O(\alpha_s^2).
Note:
  • 8 pages, 1 figure
  • particle: massive
  • phase space
  • final state: mass
  • master integral
  • decay
  • three-body problem
  • many-body problem
  • B0 anti-B0: mixing
  • higher-order: 2
  • 13.20.-v