Strange, charm, and bottom flavors in CTEQ global analysis

Understand

I discuss advances in the determination of strange, charm, and bottom quark parton distribution functions obtained in the CTEQ6.5 and CTEQ6.6 global analyses.

• These results affect electroweak precision observables and certain new physics searches at the Large Hadron Collider.
• I focus, in particular, on high-energy implications of the consistent treatment of heavy-quark threshold effects in DIS in the general-mass factorization scheme; an independent parametrization for the strangeness PDF; and the possible presence of nonperturbative ("intrinsic") charm.