They and -7 ExchangeCorrections to Parity ViolatingElastie-cattering周海清/东南大学物理系basedonPRL99,262001(2007)in collaboration with C.W.Kao, S.N.Yang2008/4/27
1 The and -Z Exchange Corrections to Parity Violating Elastic Scattering 周海清/东南大学物理系 based on PRL99,262001(2007) in collaboration with C.W.Kao, S.N.Yang 2008/4/27 2 e p-
Outline.Introduction: One boson exchange: Two boson exchange correction: Extraction from experimental data·Conclusion2
2 Outline • Introduction • One boson exchange • Two boson exchange correction • Extraction from experimental data • Conclusion
ntroductionMotivation:To extract the strange quark form factors of protonmore precisely by parity violating elastic electron-proton scattering, one-loop corrections should beconsidered more carefully, especiallythe corrections from box diagrams.The importance of these corrections has beenindicated in elastic ep scattering (to extract theelectromagnetic form factors of proton)3
3 Introduction Motivation: To extract the strange quark form factors of proton more precisely by parity violating elastic electronproton scattering, one-loop corrections should be considered more carefully, especially the corrections from box diagrams. The importance of these corrections has been indicated in elastic ep scattering (to extract the electromagnetic form factors of proton)
Proton : constructed by u, d, s, c...quarks, oneof the most important QCD bound state andcomponent of the world.Strange quark form factors of proton:io< P(p") / sμs| P(p) >= u(p')[Fμ + Fsq" Ju(p)2M1< P(p')/ sμss / P(p) >= u(p')[GAμs +GPqμJu(p)2M4
4 Proton : constructed by u, d, s, c.quarks, one of the most important QCD bound state and component of the world. Strange quark form factors of proton: 1 2 5 5 ( ') | | ( ) ( ')[ ] ( ) 2 1 ( ') | | ( ) ( ')[ ] ( ) 2 s s s s A P i P p s s P p u p F F q u p M P p s s P p u p G G q u p M = + = +
Parity violating elastic electron-proton scatteringe(pi, R / L)+ P(p2) →e(p3)+ P(p4)Apv = CR -OLr +O L5
5 Parity violating elastic electron-proton scattering: 1 2 3 4 e p R L P p e p P p ( , / ) ( ) ( ) ( ) + → + R L PV R L A − = +