The Fractured Boer-Mulders Effect in the Production of Polarized Baryons

Abstract

The fractured Boer-Mulders functions describe an inriguing class of polarization effects for the production of baryons in the target fragmentation region of deep-inelastic processes. These functions characterize transverse momentum asymmetries related to the spin orientation for different flavors of axial vector diquarks in an unpolarized ensemble of protons just as the familiar Boer-Mulders functions characterize transverse momentum asymmetries connected to the spin orientation of quarks in unpolarized targets. The asymmetries of the fractured Boer-Mulders effect originating in the proton distribution function can be separated kinematically, both in SIDIS and in the Drell-Yan process from the asymmetries of the polarizing fracture functions generated during the soft color rearrangement of the fragmentation process. The experimental requirements for this separation are presented in this article and it is shown that the fractured Boer-Mulders effect should change sign between Drell-Yan and SIDIS while the polarizing fracture functions remain the same. Simple isospin arguments indicate the two polarization mechanisms should give significantly different results for the production of polarized lambdas and sigmas.

19 pages 3 tables and 8 figures

References in corpus (11)

• Transversity and Collins functions from SIDIS and e+e- data
• A new measurement of the Collins and Sivers asymmetries on a transversely polarised deuteron target
• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV
• Master Formula for Twist-3 Soft-Gluon-Pole Mechanism to Single Transverse-Spin Asymmetry
• An application of transverse-momentum-dependent evolution equations in QCD
• Single-Spin Observables and Orbital Structures in Hadronic Distributions
• A New Fracture Function Approach to QCD Initial State Radiation
• Chiral Dynamics of the Polarizing Fracture Functions for Baryon Production
• Chiral Mechanisms Leading to Orbital Quantum Structures in the Nucleon
• Theoretical Update of Twist-3 Single-Spin Asymmetry in Semi-Inclusive DIS

Cited by in corpus (6)

• Parton Fragmentation Functions
• SIDIS in the target fragmentation region: polarized and transverse momentum dependent fracture functions
• Measurement of the transverse polarization of $\Lambda$ and $\bar{\Lambda }$ hyperons produced in proton-proton collisions at $\sqrt{s}=7$ TeV using the ATLAS detector
• Ideas in transverse spin physics
• Quantum Number Density Asymmetries Within QCD Jets Correlated With Lambda Polarization
• Spin-Directed Momentum Transfers in SIDIS Baryon Production