Factorization and end point singularities in heavy-to-light decays

By Christian W. Bauer, D. Pirjol, Iain W. Stewart. 2002

162 citations recorded by the source corpus.

We prove a factorization theorem for heavy-to-light form factors. Our result differs in several important ways from previous proposals. A proper separation of scales gives hard kernels that are free of end point singularities. A general procedure is described for including soft effects usually associated with the tail of wave functions in hard exclusive processes. We give an operator formulation of these soft effects using the soft-collinear effective theory, and show that they appear at the same order in the power counting as the hard spectator contribution.

Subfields: Finance, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/518a01596a850bd24fe6491b18c513efdd4b7158

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Finance

1. F. Tackmann
2. W. Waalewijn
3. I. Rothstein
4. Iain W. Stewart

In Nuclear and High Energy Physics

1. Iain W. Stewart
2. W. Waalewijn
3. F. Tackmann
4. I. Rothstein
5. D. Neill
6. A. Larkoski
7. A. Jain
8. Jui-yu Chiu

Citations in the corpus

• Factorization at the LHC: From PDFs to Initial State Jets (Ph.D. thesis) (2009, methodology): “166]. Our analysis is based on factorization in SCET, which rigorously and systematically separates hard, soft and collinear contributions [30, 35, 37]. We make use of a setup with SCET I and SCET II [36], carrying out the factorization in two stages at the scales Q2 and ! a;bB+ a;b respectively. We”
• Introduction to Soft-Collinear Effective Theory (2014, unknown): “This was analyzed in [179–181].”
• Factorization at the LHC: From parton distribution functions to initial state jets (2010, methodology): “We make use of a setup with SCETI and SCETII [36], carrying out the factorization in two stages at the scales Q2 and ωa,bB + a,b respectively.”
• A formalism for the systematic treatment of rapidity logarithms in Quantum Field Theory (2012, methodology): “d I. W. Stewart, Phys. Rev. D 65 ,054022 (2002) [arXiv:hep-ph/0109045]. [3] C. W. Bauer, S. Fleming, D. Pirjol, I. Z. Rothstein and I. W. Stewart, Phys. Rev. D 66 (2002) 014017 [arXiv:hepph/0202088]. [4] A. V. Manohar, I. W. Stewart, Phys. Rev. D76 ,074002 (2007). [hep-ph/0605001]. [5] J. -y. Chiu, ”