Difference between revisions of "Delta D over D"

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Title: Quark spin in the nucleon
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"At large x the perturbative QCD analysis predicts “helicity retention” – i.e., the helicity of a valence quark with x ∼ 1 will matches that of the parent nucleon." Helicity Retention https://arxiv.org/abs/hep-ph/9401328 Nucl.Phys.B441:197-214,1995
  
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Semi-inclusive deep inelastic scattering (SIDIS) experiments may be used to identify the flavor of the quark which participates in the scattering process.  Semi-inclusive scattering identifies an electron scattering experiment in which the scattered electron and one hadron are detected in the final state.  Experiments at Jefferson Lab have used longitudinally polarized electron beam to probe longitudinally polarized Hydrogen (15NH3) and Deuterium (15ND3) targets for an investigation of the quark's contribution to the properties of a nucleon. This talk will report on the measurements made using the CEBAF Large Acceptance Spectrometer (CLAS) at Thomas Jefferson National Laboratory. The incident electron's energy ranged between 1.6 GeV to 5.7 GeV and covered a kinematic region where the struck quark carries at least 30% of the nucleons total momentum (xb > 0.3). The leptons scatter mostly from valence quarks in this kinematic region allowing contributions from sea quarks to be neglected.
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[[Hall_B#Physics]]
  
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[[SIDIS_PionAsym_EG2000]]
  
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[[Introduction]]<br>
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[[Extracting_DeltaDoverD_from_PionAsym]]
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[[Tamar_Thesis_TheoryChapt]]<br>
 
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[[Tamar_Thesis_EperimentalSetupChapt]]<br>
 
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[[Tamar_Thesis_CEBAF]]<br>
 
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[[Tamar_AnalysisChapt]]<br>
 
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[[CLAS apparatus]]<br>
 
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[[Analysis]]<br>
 
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[[Software]]<br>
 
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[[DeltaDoverD_References]]<br>
 
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[[DeltaDoverD_Progress]]<br>
 
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[[TamarD_Logbook]]<br>
 
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[[GEANT4 Installation Instructions]]<br>
 
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[[reading]]<br>
 
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[[Tamar_Electron_and_Pion_Efficiency]]<br>
 
  
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[[File:tamarproposal.pdf]]
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[[TF_InclusiveDeltaDoverD]]
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;References
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;<math>\frac{\Delta d}{d}</math> from SIDIS
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#HERMES 2005 result with tables of A1 inclusive and '''SIDIS''' <math>(\Delta d/d)</math> [[File:PRD712005p012003.pdf]]
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;<math>\frac{\Delta d}{d}</math> using Inclusive
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#Hall A 2004 results for A1n and <math>(\Delta d/d)</math> usinb Inclusive Scattering [[File:PRLett92_2004_pg012004.pdf]]
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#Hall B 2007 results using Inclusive scattering Phys. Lett. B 641 (2006) 11  [[File:PLB_vol641_2006_pg11.pdf]] <math>\left (\frac{\Delta d}{d} \approx \frac{8g_1^d/(1-1.5 \omega_D) - 5g_1^p}{8F_1^d-5F_1^p}\right )</math>
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;SIDIS Cross-sections
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[[File:Asauryan_nucle-ex1103.1649.pdf]]
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[[SIDIS_CLASNOTE_2013]]
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[[Hall_B#Physics]]

Latest revision as of 19:35, 22 September 2018

"At large x the perturbative QCD analysis predicts “helicity retention” – i.e., the helicity of a valence quark with x ∼ 1 will matches that of the parent nucleon." Helicity Retention https://arxiv.org/abs/hep-ph/9401328 Nucl.Phys.B441:197-214,1995

Hall_B#Physics

SIDIS_PionAsym_EG2000

Extracting_DeltaDoverD_from_PionAsym

TF_InclusiveDeltaDoverD

References
[math]\frac{\Delta d}{d}[/math] from SIDIS
  1. HERMES 2005 result with tables of A1 inclusive and SIDIS [math](\Delta d/d)[/math] File:PRD712005p012003.pdf
[math]\frac{\Delta d}{d}[/math] using Inclusive
  1. Hall A 2004 results for A1n and [math](\Delta d/d)[/math] usinb Inclusive Scattering File:PRLett92 2004 pg012004.pdf
  2. Hall B 2007 results using Inclusive scattering Phys. Lett. B 641 (2006) 11 File:PLB vol641 2006 pg11.pdf [math]\left (\frac{\Delta d}{d} \approx \frac{8g_1^d/(1-1.5 \omega_D) - 5g_1^p}{8F_1^d-5F_1^p}\right )[/math]
SIDIS Cross-sections

File:Asauryan nucle-ex1103.1649.pdf

SIDIS_CLASNOTE_2013

Hall_B#Physics

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