ISU Coloq 11-3-2014

electron scattering (collisions)

Elastic Collisions: Conserve P and E

Inelastic : Only Conserve P

Definition of Momentum Transfer

4-Momentum vector definition using Ryder convention

[math]\displaystyle{ P_{\mu} \equiv \left ( \frac{E}{c} , - \vec p \right ) }[/math]

[math]\displaystyle{ P^{\mu} \equiv \left ( \frac{E}{c} , \vec p \right ) }[/math]

[math]\displaystyle{ P_{\mu} P^{\mu} = \left ( \frac{E}{c}\right )^2 - \vec p^2 = E^2-p^2 = m^2 }[/math] if you define the speed of light as unity

Note

Other conventions used by Perkins

[math]\displaystyle{ P_{\mu} \equiv \left ( \vec p, -E \right ) }[/math]

[math]\displaystyle{ P^{\mu} \equiv \left ( \vec p , E\right ) }[/math]

or Kollen

[math]\displaystyle{ P_{\mu} \equiv \left ( \vec p, iE \right ) }[/math]

[math]\displaystyle{ P^{\mu} \equiv \left ( \vec p , iE\right ) }[/math]

Momentum transfer is defined as

[math]\displaystyle{ q_{\mu} \equiv ( \omega, \vec q) = P^i_{\mu} - P^f_{\mu} }[/math]  : conservation of momentum

[math]\displaystyle{ q_{\mu}q^{\mu} = (E_i - E_f)^2 - (\vec {P}_i - \vec{P}_f) \cdot (\vec {P}_i - \vec{P}_f) }[/math]

[math]\displaystyle{ = m_i^2 +m_f^2 - 2E_iE_f + 2 \left | \vec {P}_i \right | \left | \vec {P}_f \right | }[/math]

Spin 1/2 and 3/2 final states

References

Theory

Phenomenological

NP, B291(1987)793; NP, B346(1990)1;

    Z. Phys. C56(1992)493;
    Eur. Phys. J. C44  (2005)219;
    hep-ph/0205123
    arXiV:1310.5285

QCD inspired

NP, B483(1997)291; NP, B484(1997)265;

    PRL 85(2000)3591; PRL 89(2002)162301;
    JHEP 0211(2002)44; NP, A720(2003)131; 
    Eur. Phys. J. C30(2003)213; arXiV:09073534;
    NP, A761(2005)67; PR, C81(2010)024902

Hybrids

PYTHIA + BUU simulation

     PR, C70(2004)054609; NP, A801(2008)68

Experiment

keith's 2012 talk in Italy on EG1-DVCS

Unpolarized

http://link.springer.com/article/10.1007%2FJHEP04%282014%29005

File:AndyMiller 200TalkAtDESY.pdf 2002 talk by CA Miller at DESY

File:Dueren.98.055.pdf 1998 Duren talk

2013 APS talk on EG1-DVCS

July 30,2014 talk by XingLong Li at Heremes File:XingLongLi TalkOnPACIAEmdoelForSIDIS.pdf from

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=31&ved=0CB0QFjAAOB4&url=http%3A%2F%2Fhadron2014.csp.escience.cn%2Fdct%2Fattach%2FY2xiOmNsYjpwZGY6MzAwMjA%3D&ei=UPw1VNiQAdHlsATA7IHwDw&usg=AFQjCNH5yyek_zTJ22TZq0Dw_YLUeAxe2Q

Xiangs proposal for CLAS12 measurement of SIDIS Xsections see Fig. 1

Semi-inclusive deep inelastic scattering at small transverse momentum

Naomi's SIDIS Hermes talk from 2011 at NNPSS11

1986 article ob QCD effects in semi-inclusive deep inelastic scattering from a polarized target by P. Chiappetta J. -Ph. Guillet

theses

2014 Ph.D thesis of Naomi's student Sylvester Joosten

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0CFYQFjAG&url=http%3A%2F%2Fwww.nikhef.nl%2Fpub%2Fservices%2Fbiblio%2Ftheses_pdf%2Fthesis_E_Garutti.pdf&ei=Osw3VJbSAY27ogSx3IDwDQ&usg=AFQjCNENlNdgPr6dgfq9OanlL8cUnYHmMQ&bvm=bv.77161500,d.cGU

TF_SIDIS_Physics