Penn State Science
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QCD
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Prof. Collins' research is mainly on the theory of the strong interactions of elementary particles-quantum chromodynamics (QCD). He works on understanding the dynamics of this complicated theory primarily in the context of high-energy scattering.

Publications

«  2007 · 2008 · 2009 · 2011 · 2012 · All
M. Aybat, J. C. Collins, J. W. Qiu and T. C. Rogers, "The QCD Evolution of the Sivers Function," Phys. Rev. D 85, 034043 (2012) Abstract/Comments
J. C. Collins, "CSS Equation, etc, Follow from Structure of TMD Factorization", (2012) http://arXiv.org/abs/1212.5974 Abstract/Comments
E. Avsar and J. C. Collins, "Inability to find justification of a k_T-factorization formula by following chains of citations", (2012) http://arXiv.org/abs/1209.1675 Abstract/Comments
J. C. Collins and T. C. Rogers, "`Equality of Two Definitions for Transverse Momentum Dependent Parton Distribution Functions", (2012) http://arXiv.org/abs/1210.2100 Abstract/Comments
J. C. Collins, "Parton distribution functions (definition)," Scholarpedia 7(7), 10851 (2012) Abstract/Comments
J. C. Collins, "Foundations of Perturbative QCD" (Cambridge Univ. Press, 2011) Abstract/Comments
J. C. Collins, "New definition of TMD parton densities", (2011) http://arXiv.org/abs/1107.4123 Abstract/Comments
J. C. Collins, D. Binosi, C. Kaufhold and L. Theussl, "axoDraw: A graphical user interface for drawing Feynman diagrams. Version 2.0 release notes," Comput. Phys. Commun. 180, 1709 – 1715 (2009) Abstract/Comments
J. C. Collins, T. C. Rogers and A. M. Stasto, "Fully Unintegrated Parton Correlation Functions and Factorization in Lowest Order Hard Scattering," Phys. Rev. D 77, 085009 (2008) Abstract/Comments
J. C. Collins and T. C. Rogers, "The Gluon Distribution Function and Factorization in Feynman Gauge", (2008) http://arXiv.org/abs/0805.1752 Abstract/Comments
J. C. Collins, "Rapidity divergences and valid definitions of parton densities", (2008) http://arXiv.org/abs/0808.2665 Abstract/Comments
J. C. Collins and J. W. Qiu, "Factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions," Phys. Rev. D 75, 114014 (2007) Abstract/Comments
J. C. Collins, "2-soft-gluon exchange and factorization breaking", (2007) http://arXiv.org/abs/0708.4410 Abstract/Comments
J. C. Collins, "Renormalization: General Theory", in Encyclopedia of Mathematical Physics, Ed.: J.-P. Fran├žoise, G.L. Naber and S.T. Tsou (Elsevier, 2006) p. 399 Abstract/Comments
J. C. Collins, A. Efremov, K. Goeke, S. Menzel, A. Metz and P. Schweitzer, "Sivers effect in semi-inclusive deeply inelastic scattering," Phys. Rev. D 73, 014021 (2006) Abstract/Comments
J. C. Collins, A. V. Manohar and M. B. Wise, "Renormalization of the Vector Current in QED," Phys. Rev. D 73, 105019 (2006) Abstract/Comments
J. C. Collins, A. Efremov, K. Goeke, M. Grosse Perdekamp, S. Menzel, B. Meredith, A. Metz and P. Schweitzer, "Sivers effect in Drell Yan at BNL RHIC," Phys. Rev. D 73, 094023 (2006) Abstract/Comments
J. C. Collins and X. Zu, "Initial State Parton Showers Beyond Leading Order," JHEP 0503, 059 (2005) Abstract/Comments
J. C. Collins and H. Jung, "Need for fully unintegrated parton densities", (2005) hep-ph/0508280 Abstract/Comments
J. C. Collins and A. Metz, "Universality of soft and collinear factors in hard-scattering factorization," Phys. Rev. Lett. 93, 252001 (2004) Abstract/Comments
J. C. Collins and X. Zu, "Rapidity and Transverse Momentum Distributions of DIS 1-jet Inclusive Cross Section -- A Next-to-Leading Order Monte-Carlo Prediction", preprint (2002) hep-ph/0212053 Abstract/Comments
J. C. Collins, "Factorization for hard exclusive processes", in Proceedings of workshop "Spontaneously broken chiral symmetry and hard QCD phenomena", Bad Honnef, Germany, July 15-19, 2002, (, 2002) p.
J. C. Collins and X. Zu, "Rapidity and Transverse Momentum Distributions of DIS 1-jet Inclusive Cross Section -- A Next-to-Leading Order Monte-Carlo Prediction", (2002) hep-ph/0212053
J. C. Collins, "Factorization in hard diffraction," J. Phys. G 28, 1069 – 1077 (2002)
J. C. Collins, "PDF uncertainties: A strong test of goodness of fit to multiple data sets", in in Proceedings of 9th International Workshop on Deep Inelastic Scattering and QCD, Ed.: G.Bruni, G.Iacobucci and R.Nania (, 2001) p.
L. Alvero, J. C. Collins and J. J. Whitmore, "Diffractive Parton Distributions," Nucl. Phys. Proc. Suppl. 79, 382 (1999)
J. C. Collins, "Is There a Relationship Between the Distributions of Transversely and Longitudinally Polarized Quarks", in Proceedings of the Polarized Collider Workshop, Ed.: J.C. Collins, S. Heppelmann, and R. Robinett (AIP, 1991) p. 364-370
J. C. Collins and R. K. Ellis, "Factorization at small x," Nucl. Phys. B 18C, 80 – 85 (1990)
J. C. Collins, "Sudakov form factors", in Perturbative QCD, Ed.: A.H. Mueller (World Scientific, 1989) p. 573
J. C. Collins, D. E. Soper and G. Sterman, "Factorization of Hard Processes in QCD", in Perturbative QCD, Ed.: A.H. Mueller (World Scientific, 1989) p.
J. C. Collins, D. E. Soper and G. Sterman, "Status report on the factorization for Drell-Yan", in Proceedings of Moriond Workshop, (Unspecified Publisher, 1983) p.
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J. C. Collins : Perturbative QCD