B2B hadron production in SIDIS

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Presentation transcript:

B2B hadron production in SIDIS M. Anselmino, V. Barone and A. Kotzinian, Physics Letters B 713 (2012) CLAS PRELIMINARY The single beam and target spin asymmetries appear, at leading twist and low transverse momenta, in the deep inelastic inclusive lepto-production of two hadrons, one in the target fragmentation region and one in the current fragmentation region. {\cal{F}}_{LU}^{\sin(\phi_1-\phi_2)}=\frac{\mid\vec{P}_{1\perp}\vec{P}_{2\perp}\mid}{m_Nm_2} {\cal{C}}[w_5M_L^{\perp,h}D_1] PAC2016: Submit a CLAS12 proposal for studies of b2b with polarized and unpolarized targets. Significant asymmetries observed in b2b proton-pion by CLAS at 6 GeV TMDe2015, Sep 2

b2b distributions: CLAS12 (proton-pion) H. Avakian, JLab, July 1

Target fragmentation region: L production polarization transfer coefficient probability to produce the hadron h when a quark q is struck in a proton target E12-06-112A/E12-09-008A 60 days of CLAS12 Measurements of fracture functions opens a new avenue in studies of the structure of the nucleon in general and correlations between current and target fragmentation in particular Large acceptance of CLAS12 and EIC provide a unique possibility to study the nucleon structure in target fragmentation region First measurements already performed using the CLAS data at 6 GeV. TMDe2015, Sep 2

Predictions for CLAS12 proton and deuteron targets provide good valence quark-flavour sensitivity to disentangle Muv from Mdv TMDe2015, Sep 2

Support slides…. TMDe2015, Sep 2

b2b SSAs H. Avakian, JLab, Aug 17

b2b SSAs H. Avakian, JLab, Aug 17

SSAs in exclusive pseudoscalar meson production transverse x-section dominates, providing access to chiral-odd GPDs KS asymmetries are predicted to be large and with opposite sign to KL Exclusive production of KL and KS provide access to different combinations of chiral-odd GPDs Beam and target asymmetries in exclusive production of KL and KS are very sensitive to chiral-odd GPDs. Proposal for PAC44 0.5 1.0 Goloskokov&Kroll Goldstein, Hernandez, & Liuti TMDe2015, Sep 2

Controlling the flavor content with target-current correlations X p π K xF Large acceptance of CLAS12 (and EIC) provide a unique possibility to detect simultaneously hadrons in the forward and backward regions TMDe2015, Sep 2