Draft 87 Status

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Status page for Draft 87: Transverse Target Moments for Leptoproduction of Exclusive Fehler beim Parsen (Konvertierungsfehler. Der Server („https://wikimedia.org/api/rest_“) hat berichtet: „Cannot get mml. Server problem.“): {\displaystyle \phi }
 and Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle \omega}
 mesons.

Current Summary

Analysis

Analysis Plan

• Extract data from uDST, take all possible track combinations, apply cuts
• Invariant mass plots show we have really isolate the particles of interest
• Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle \Delta E} plot is used to show exclusivity, as well as to estimate background fraction
• Moments are fit using Maximum Likelihood fit, unbinned in angles. The fit function is

Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle   \begin{align}     f( \phi, \phi_S) = \Bigg\{A_7 \cos(\phi) + A_8\cos(2\phi)\Bigg\} \pm _P_T_\Bigg\{ &A_1 \sin(\phi+\phi_S) + A_2 \sin(\phi-\phi_S) + A_3 \sin(\phi_S) \\        & + A_4 \sin(2\phi+\phi_S) + A_5 \sin(2\phi-\phi_S) + A_6 \sin(3\phi-\phi_S)\Bigg\}.  \end{align}  }

• The same cuts and fit are applied to Pythia data from

/mcdata01/DATA/PYTHIA6/RESULTS_P99_Q2cut_RAD_MSTP18_3_2004C_HRC_NEWHMC

• Moments are corrected for SIDIS background: let Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle A^{RAW}} be the uncorrected moment, while Fehler beim Parsen (Konvertierungsfehler. Der Server („https://wikimedia.org/api/rest_“) hat berichtet: „Cannot get mml. Server problem.“): {\displaystyle A^{BKG}} the moments from Pythia, without Process 91 events. The corrected moment and uncertainty are then

INSERT FORMULA

• Acceptance/smearing correction issues are awaiting further systematic studies. But Normalization Monte Carlo is inappropriate for this analysis. See Talk from Sept. 09

Cuts and Extraction

• Productions used: 02d1, 03d1, 04d2, 05d1
• Transverse magnet correction: TMC1 is used for all years.
• Beam energy correction is applied
• RICH Unfolding: the omega analysis does not use the RICH. The phi analysis does, but no RICH unfolding has been preformed.

FILL THE REST OF THE CUTS

Systematic Uncertainties

• Vary background fraction up and down by fixed amount. Do SIDIS BKG correction for both these cases, and take the maximum absolute deviation as a systematic uncertainty.
• Vary extracted background moments up and down by one standard deviation. Do SIDIS BKG correction for both these cases, and take the maximum absolute deviation as a systematic uncertainty.
• Put model (similar to data) into rhoMC, compare moments in Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle 4\pi} Born vs. reconstructed + radiative effects. Again, take the maximum absolute deviation as a systematic uncertainty.

Internal References

• Final release reports for omega and phi
• Recent talks
  • phi Status as of Sept 09: [1]
  • Start of a draft from around Sept. 2009 and slightly updated April, 2010. tex pdf Analysis plans/methods match most closely something from Summer 2009.
  • FILL THIS IN

Status Updates by Date

Sept 2009

• Remove non-exclusive background correction for phi analysis and fit mass spectrum to Brite-Wigner
• Witold to crosscheck the phi analysis
• Steve to work on text of draft, share with rest of the committee
• Use HTC (reversed Feb. 2010)

February 2010

During Strategy Meeting of Feb. 23rd, part of an Exclusive week, it was decided to use HRC and not HTC. The results change very little, and Monte Carlo productions are already available for HRC. The d productions will still be used. See also notes from the meeting.

April 2010 -- before Collaboration Meeting

Decisions

• Use 8 parameter fit
• Do not put LT separation in the paper (for now)
• Use "formula" method of SIDIS background correction instead of negative weights for phi (in order to match omega)

To Do

• Acceptance/Smearing
  • Need Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle A_{UU}} and Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle A_{UT}} moments with kinematic dependencies put into rhoMC for phi and omega
    • This might already have been partially done?
  • Compare 4 Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle 4\pi} Born vs. Reconstructed with radiative effects
  • If difference is small, assign as systematic uncertainty
  • If difference is large, consider corrections methods (but not Normalization Monte Carlo)
• Cross check for phi
• Review cuts and make more uniform for phi and omega, as appropriate
• Use the same binning for phi and omega
• phi analysis probably needs new "release" with kinematic dependencies at some point
• Update text of draft

Open issues

• Do we need new cross check for omega or not?
• Does omega need new "release"?
• How ready is rhoMC to do what we need it to do?
• Concerns that other collaboration members still want normalization Monte Carlo
• What is 4in1 systematic discussed in Feb. 2010 meeting and what do we need to do about it?

June 2010

• Document regarding model for kinematic dependencies of asymmetry moments---to be used for acceptance studies. [2]

July 2010

Before DC Meeting

• Updated document on acceptance studies, to supersede the document listed above under June 2010 [3]
• Copy of Witold's DIS 2010 Conference Proceedings [4] (as attached to email [5])
• Perceived Open Issues
  • Acceptance study for phi and omega [6]
    • Will decide whether to assign systematic or to do correction
    • Will also determine whether to use asymmetry or amplitude moments (though there isn't much difference)
    • I assumed that Pythia has no A_UT moments, but this might have been a wrong assumption.
  • Cross check for phi with Witold (need to schedule a time for this)
  • Release of kinematic dependencies for phi (mainly awaiting acceptance study and cross check)
  • Final review of cuts--ensure consistent between omega & phi
  • Who will make the final plots, so that cosmetics are consistent?
  • Anything else?
• Newest version (v.0.1.r0) of draft tex pdf
  • Please review and provide feedback!

Summary of DC Meeting of July 16th

• Andy Miller reasserted the need to release the amplitude moments ($A_{UT}$ from Eq. 7 not Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle \mathcal{A}_{UT}} of Eq. 1, both equations from Ami's note
  • Better to not mix in the unpolarized moments
  • Consistent with SIDIS analysis
  • More easily interpreted---preferred by theorists
• Must now decide what to do about the Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle \cos(n\phi)} moments
  • Compare the results of
    1. Have free parameters in the fit for the cos moments & use norm MC
    2. Fix the cos moments in the fit using the SDME values
  • If values and uncertainties consistent between (1) and (2) then publish results using (1)
  • If not, then check the kinematic distributions in the Monte Carlo and re-evaluate what to do next
• Decided just to release moments in acceptance, or at least not do further studies on this issue
  • With few statistics, the main conclusion of the paper will only be whether the moments are consistent with zero or not, and possibly the sign of the asymmetries
  • Not enough data to fit higher order polynomials to the data (as done for SIDIS analysis)
  • Also no need to compare kin. distributions of Monte Carlo vs. data for now
• Would like to look at 3D grid (Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle x} ,$-t^{\prime }$,Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle Q^2} ) of the moments from Goloskokov/Kroll paper.
  • Look to see if strong correlations between variables
  • P. Kroll will be in Hamburg in Sept.---Ami will ask then
• Witold brought up some good points about the hierarchy of the moments
  • Comments related to Deihl Sapeta paper
  • Witold will email the comments for inclusion in the paper.
• As per plot kinematics, Bohdan will make the plots
  • Steve will send values of the moments--Bohdan can use current code for final results plot
  • Bohdan will make nice plots for Fehler beim Parsen (MathML mit SVG- oder PNG-Rückgriff (empfohlen für moderne Browser und Barrierefreiheitswerkzeuge): Ungültige Antwort („Math extension cannot connect to Restbase.“) von Server „https://wikimedia.org/api/rest_v1/“:): {\displaystyle \Delta E} and invarient mass distributions
    • Can use Witold's data for phi, after the cross check, so as to not mix ROOT and PAW files
• Cross check for phi between Steve and Witold planned for September.
• Not enough time since newest version of draft to discuss text
• Thanks to Ami and Andy for joining todays meeting!