Positivity bounds for Sivers functions
Zhong-Bo Kang (RIKEN BNL), Jacques Soffer (Temple U.)
TL;DR
This paper extends positivity bounds to parity-violating processes, providing new constraints on Sivers functions that influence the theoretical understanding of single spin asymmetries in particle physics.
Contribution
It generalizes existing positivity bounds to include parity-violating cases, offering novel theoretical constraints on Sivers functions.
Findings
Derived new bounds on Sivers functions for parity-violating processes
Extended positivity constraints to a broader class of processes
Provides theoretical limits relevant for single spin asymmetry studies
Abstract
We generalize a positivity constraint derived initially for parity-conserving processes to the parity-violating ones, and use it to derive non-trivial bounds on several Sivers functions, entering in the theoretical description of single spin asymmetry for various processes.
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