planner and allocation rounding

Planner only considers whole units of resources, so all resource allocations are always truncated to the next lowest percent. That explains discrepancy between planner cost/duration and that of primavera for the PWA development line.

Seminar: Yi

Yi Qiang, Duke

TRANSVERSE MOMENTUM-DEPENDENT SPIN STRUCTURE OF NEUTRON
YI QIANG
DUKE UNIVERSITY
Transversity is quark’s transverse polarization in a transversely polarized nucleon. At a realistic 3-D point of view, transversity is the lease known one compared to the f1 and g1 distribution functions. At Jefferson Lab Hall A, we recently finished the first measurement of the target single spin asymmetry in the semi-inclusive deep inelastic scattering with a transversely polarized 3He target. The goal is to extract neutron transversity which gives a unique azimuthal angular dependence in target single spin asymmetry when convoluted with Collins fragmentation function in SIDIS reactions. Other two leading twist transverse momentum distributions, Sivers function and pretzelosity will be extracted as well. The data from this experiment, when combined with world data collected on proton, deuteron SIDIS and e+e- annihilation, will provide constraints on the transversity, Sivers distributions and Collins fragmentation function on both u and d-quark in the valence region. Details of the experiment will be presented.

• Nucleon structure through DIS
• Nucleon Spin Structure
• Transverse spin structure
• Leading Twist TMD’s
• Fermilab E704 :p^up arrow p to pi X at 400 GeV
• Collins Effect (fragmentation H_1^perp(z,p_t))
• Sivers Effect (distribution f_1T^perp(x,k_T))
• SIDIS electroproduction of pions
  • separate Sivers and Collins effects
• Access leading twist parton distributions through semi-inclusive DIS
• HERMES Hydrogen Results (2002-2005)
• COMPASS Deuteron Results (2002-2004)
• COMPASS Hydrogen Results (2007)
• Summary of current data
  • Transversity h_1T
  • Siverfs Distribution f_1T^perp
  • ^3He data is crucial
• E06-010 Collaboration
• E06-010 Setup
• Why ^3He target?
• Polarized ^3He Target in Jefferson Lab Hall A
• Target Setup for Transversity
• ^3He Target Polarimetries
• Target Performance
• BigBite Spectrometer
• BigBite Optics
• Pre-Shower/Shower in BigBite
• High Resolution Spectrometer
• Hadron PID and Coincidence
• Kinematics Coverage
• Projections of Collins Asymmetries
• Projections of
• Status of E06-010
• 12 GeV upgrade of JLab
• Solenoid for SIDIS
• from Exploration to Precision
• Summary

 

fixing EVO audio

Ray Swingle fixes it for me:

Mark,

I installed the intel audio drivers for you. Please reboot and see if
it is working now.

Thanks,

Ray

Line from /var/log/messages:

Oct 27 10:06:02 roentgen yum: Installed: gnome-audio-extra-2.0.0-3.1.1.noarch

 

Start Counter geometry discussion with Sasha

• Werner has a python (perl?) script that generates an HDDS specification of the start counter, including rohacell support and light guides. Seem like this works, more or less.
• Tim/Chuck have some version from the past that has an uncertain relationship to the latest design.
• The version in HDGeant presently is pretty close to Werner’s latest thinking.
• Essential features of the current design are 40 sectors, 2 cm diameter opening for beam in forward direction.
• Need a way to align HDGeant and Tim’s/Chuck’s (I-DEAS) drawings
• Need to establish an authority for changing the geometry of the target. Some start counter design considerations might depend on the possibility of changing target geometry choices.

 

Seminar: Egiyan

Search for Φ(1862) Pentaquark States
Hovanes Egiyan
University of New Hampshire
Following first observations of the possible S = +1 pentaquark state Θ+ (1540), there have
been many experiments in various laboratories to verify these results and to search for
states which could be associated with other members of the pentaquark antidecuplet. The
NA49 collaboration reported observations of narrow S = −2 states with masses about
1860 GeV showing in the Ξπ invariant mass spectra. These states were identified as
isospin 3/2 members of the pentaquark antidecuplet, and were named Φ(1862). However,
other experiments, some of which were of very high statistics, have failed to reproduce
these results. A dedicated experiment has recently been performed at Jefferson Lab using
the CLAS detector to search for the Φ(1862) state in photoproduction on a deuterium
target. A large data sample has been collected and analyzed containing approximately
two thousand π − Ξ− candidates. After a brief introduction to the subject the CLAS
experiment will be described, and the results will be presented during this talk.

• confined quarks
  • mesons baryons
  • tetraquark pentaquark, glueball meson, hybrid meson
• SU(3) Classification of Hadrons
• Pentaquarks
• Possile gamma-Production Mechanisms
• Theta(1540) Pentaquark
• SPRING-8 Result
• CLAS Results on Deuteron
• Positive Results for Theta+
• Null Results form Theta+
• Confirmed Positive Results
• Phi(1860) Pentaquark
• Observation of Phi(1860), NA49 CERN SPS
• Photoproduction Limits (HERMES)
• Photoproduction Limits (FOCUS)
• CLAS Experiment
• Phi–(1860) Decays
• CLAS Detector @JLab
• CLAS Data
• Schematic of the Experiment
• Sample Event
• Reconstruction of Lambda(1116)
• Identification of Cascade-(1321)
• Cascade-(1321) peak
• [Lambda pi-]pi- Mass Spectrum
• Sideband Subtraction, need to relax vertex cut to get sigmaXbr absolute limit
• Photon Flux Normalization
• Trigger Inefficiencies
• Inefficiency Corrections
• Normalization Check
• Acceptance Uncertainties
• Upper Limits, 90%CL ~0.55 nb, preliminary
• …And Other Results
• Conclusions

 

swim back experiment

Noticed in the past that some fits throw exceptions with non-bracketed minima because a trial trajectory starts swimming away from some hit. Tried swimming backward from initial position and then initial step more likely to start toward the hits. This was not a panacea.

NOTES

working in /local/swim_quick on roentgen
damn: no push_front member function in vector
kludge: swim back and put farthest back point as first point on trajectory

original version:

MyTrajectory::doca: bad initialization of doca search: 0 1 1574 10.96 11.2782 68.0906
==========fit error = 1===========
= at event 25
MyTrajectory::doca: bad initialization of doca search: 0 1 1027 7.39348 7.70726 60.046
==========fit error = 1===========
= at event 32
MyTrajectory::doca: bad initialization of doca search: 0 1 2000 10.96 11.2014 14.775
==========fit error = 1===========
= at event 66
MyTrajectory::doca: bad initialization of doca search: 0 672 673 34.4129 6.08385 5.9746
==========fit error = 1===========
= at event 70

swim_back version, single swim back point:

MyTrajectory::doca: bad initialization of doca search: 0 1 303 18.093 18.7091 58.895
==========fit error = 1===========
= at event 57
MyTrajectory::doca: bad initialization of doca search: 0 1 548 27.948 28.7997 35.4432
==========fit error = 1===========
= at event 70
MyTrajectory::doca: bad initialization of doca search: 0 1 648 26.6388 28.9513 66.7086
==========fit error = 1===========
= at event 90

Note that all of these are tough changes, e. g. event 70, which is in both configurations:

event 70, gives exception with non-bracketed minimum with or without swim-back method for trajectory

This test version was checked into branches/src/programs/Analysis/plugins/trkfitterLSLM-swim-back-quick-and-dirty .

Seminar: Hoblit

Sam Hoblit, BNL, October 26, 2009

Recent results of double polarization pion photoproduction measurements with frozen-spin HDice from the LEGS facility at BNL

• forward elastic (Compton) photon scattering
• Mainz+Bonn measurements on polarized protons in (GDH sum rule)
• Laser Electron Gamma Source (LEGS)
• spectrum characteristics
• spring ‘05 data set
• HDice Frozen-Spin Target
• Spin Asymmetry array (SASY)
• LEGS-Spin Collaboration
• photoproduction data
• gamma+HD Polarized cross sections and asymmetries
• single-spin (beam) asymmetry and double-spin (beam-target) asymmetries
• polarization plots of data
• ?polarization lifetime?
• ?how is polarization of the H and D determined separately?
• E-hat from H? sigma(P) – sigma(A), compare with SAID and MAID, function of theta^pi_Lab, various energies, pi0
• same for charged pi
• H, pi0, self consistent efficiency with angle, versus ab initio efficiecy gives different results
• extracting phi-dependent quantities
• G^(H) asymmetries (numerator, i. e., cross section)
• GDH sum rule should hold for any spin system
• GDH for gamma + Deuteron
• Arenhovel expectations vs data, Mainz, LEGS, neutral pi
• same for charged pi
• GDH(D) contribution above pi-threshold, ok agreement with theory
• Sigma^(HD) only measurable, subtract Sigma^(H_SAID)
• data, charged and neutral
• measuring neutron efficiencies with gamma p to pi+ n
• cross section asymmetries, on D(gamma,???)???
• gamma n to pi N from
• neutron vs proton sum rules, GDH
• isolating a quasi-free neutron w/ coplanarity
• make cut on neutrons at 180: quasi-free
• E data n(gamma,pi0n)
• What do we learn from all this
  • GDH(p)
  • GDH(D)
  • GDH(n)
• gamma n to pi- p, a challenge at low energies
• SASY TPC
• TPC Critial Technologies
• Sample TPC events
• TPC particle ID
• TPC charge separation
• Prospects for information on the GDH(n) puzzle
  • E results for gamm n(p) to pi0 n(p) differ from current multipole solution
  • GDH(n) contribution require absolute cross section scale
  • TPC prides unique pi+/pi- separation

 

Offline Computing Project Management meeting with Eugene and Dave

• time scale for change: 2 weeks
• items to delete
  • geant4
  • upv reconstruction
  • cerenkov reconstruction
  • upv calibration
  • cerenkov calibration
  • pwa development
  • pwa challenge
  • grid implementation
• major areas of focus
  • steps: where and what should be added?
  • timeline/manpower: do things need to be changed?
  • progress: on the steps/timeline
  • cost: contributed effort or lab effort?
• BIA vs. 12 GeV
  • consider only in the context of 12 GeV
  • if there are dependencies between the two they are not known now to us
• original manpower estimates done on the basis of a gluex note by David
• need to talk to Phil to find out the parameter space in which we are working

notes on an alternate build makefile

/home/scratch/build uses Makefile and a local file, setup.csh
How does new system differ from Makefile_halld?

• Makefile_halld puts in the getarg fix if the fortran compiler is gfortran
• Makefile_halld does the touch on hddm_s.h and .c
• Makefile_halld makes the prod link in the “halld” directory
• Makefile_halld needs correct definitions commented in/out when going from tagged versions vs. trunk

convenient commands for jlab farm job start information

jobstat > jobstat2.txt
perl -n -e 'split; print "$_[0] $_[1] $_[2] $_[3] $_[4] $_[5] $_[6] $_[7] $_[8] $_[11]\n";' < jobstat2.txt > j2.txt
diff j1.txt j2.txt | less