Hadron Production Measurements Outline
Rowe, Peter, Features Writer/Columnist has reference to this Academic Journal, PHwiki organized this Journal Hadron Production Measurements presented by Giles Barr, Ox as long as d ICRR-Kashiwa December 2004 Hadron production needed as long as underst in addition to ing Neutrino beams spectrum, composition Extensive Air Showers muon component, energy determination Neutrino Factories optimisation of pion collection Atmospheric Neutrinos
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Outline Section 1: Introduction Section 2: NA49 Experiment Data taking Errors in addition to corrections Section 3: Other experiments HARP E910,MIPP 1 GeV 10 100 1 TeV 1 GeV 10 100 1 TeV 10 Parent energy Daughter energy Boxes show importance of phase space region as long as contained atmospheric neutrino events. 10 Summary of measurements available Existing measurements. 10 Existing measurements Boxes show importance of phase space region as long as contained atmospheric neutrino events.
Barton et. al. Atherton et. al. SPY Serpukov Allaby et. al. Abbott et. al. Eichten et. al. Cho et. al. Measurements. 1-2 pT points 3-5 pT points >5 pT points PT range covered Boxes show importance of phase space region as long as contained atmospheric neutrino events. New measurements. HARP NA49 MIPP New measurements Boxes show importance of phase space region as long as contained atmospheric neutrino events. Another view (MINOS) Plot courtesy of M. Messier Atherton 400 GeV Be Barton 100 GeV C Spy 450 GeV Be
NA20 (Atherton et al.), CERN-SPS (1980) Secondary energy scan: 60,120,200,300 GeV H2 beam line in the SPS north-area Overall quoted errors Absolute rates: ~15% Ratios: ~5% Needs Pion in addition to kaon production Projectile: p, He, , K etc. Very large range of primary energies [2 GeV,>1 TeV] Target: Air nuclei (nearby isoscalar nuclei acceptable) Full phase space coverage pT distribution not interesting Full coverage of pT important Importance of kaons at high energy (Thanks to S. Robbins as long as plot) NA49
NA49 experimental layout Target Gap TPC S4 counter Vertex TPCs Main TPCs NA49 originally designed as long as Lead-Lead collisions. Also used as long as pp in addition to pA collision physics NA49 Proton-Carbon run P322 group consisting of some atmospheric neutrino flux calculators, HARP experimentalists in addition to MINOS experimentalists as long as med collaboration with NA49 in addition to proposed a series of measurements. Received a 1 week test run with a carbon target. It took place in June 2002. 158 GeV run, 500k triggers. 100 GeV run, 160k triggers. 1% interaction length carbon target. Proton selected beam (using Cerenkov). TPCs, HCAL, CD, no TOF. Immediately preceeding run was an NA49 proton-proton run, using a liquid hydrogen target.
Beam line Cerenkov CEDAR counters Beam chambers Trigger S1-S3 S4 veto Vertex TPC 1 B=1.7T Vertex TPC 2 B=1.7T Gap TPC Main TPC Left Main TPC Right NA49 dE/dx plots P (GeV) dE/dx plot as long as positives Particle ID
NA49 dE/dx fits Particle ID Bins Technique: Follow closely the analysis of p-p data xF in addition to pT bins Some corrections are identical Pion analysis Analysis: Get pion yields as long as proton-proton, followed by pion yields as long as proton-carbon Later, do kaons, antiprotons. Pion extraction straight as long as ward shifts in addition to resolution easy to determine Above xF = 0.5, dE/dx in as long as mation not available near gap. We do have the track distributions. Particular region at low xF where in addition to p dE/dx curves overlap. Use reflection in p-p. Almost no in as long as mation at negative xF
Corrections in addition to errors on pion yields Prospects Pions as long as proton-proton available shortly. Pions as long as proton-carbon follow rapidly after this. Some atmospheric specific changes can be made Use XLAB Feed down required Kaon yields is next priority Extraction not too bad in positives NK not strongly correlated to K-peak position. Challenge at high xF in negatives. HARP
The Harp detector: Large Acceptance, PID Capabilities , Redundancy TPC, momentum in addition to PID (dE/dX) at large Pt Drift Chambers: Tracking in addition to low Pt spectrometer 1.5 T dipole spectrometer Threshold gas Cherenkov: p identification at large Pl 0.7T solenoidal coil Target-Trigger EM filter (beam muon ID in addition to normalization) Drift Chambers: Tracking TOF: p identification in the low Pl in addition to low Pt region HARP Experiment Beam 3-15 GeV protons, CERN PS Collected data 2001, 2002 Secondary hadron yields Beam momenta As a function of momentum in addition to angle of daughter particles For different daughter particles As close as possible to full acceptance The aim is to provide measurements with few % overall precision efficiencies must be kept under control, down to the level of 1% primarily trough the use of redundancy from one detector to another Thin, thick in addition to cryogenic targets LH2, LD2, LO2 LN2 Be, C, Al, Cu, Tn, Sn, Pb T9 secondary beam line on the CERN PS allows a 215 GeV energy range O(106) events per setting A setting is defined by a combination of target type in addition to material, beam energy in addition to polarity Fast readout Aim at 103 events/PS spill, one spill=400ms. Event rate 2.5KHz Corresponds to some 106 events/day Very dem in addition to ing (unprecedented!) as long as the TPC. Beam Particle Identification Beam Time Of Flight (TOF): separate p/K/p at low energy over 21m flight distance time resolution 170 ps after TDC in addition to ADC equalization proton selection purity >98.7% Beam Cherenkov: Identify electrons at low energy, p at high energy, K above 12 GeV ~100% eff. in e-p tagging 12.9 GeV/c (K2K) Beam Cherenkov ADC p K p/d p K p d 3.0 GeV/c beam
Forward PID: TOF Wall TOF time resolution ~160 ps 3s separation: p/p up to 4.5 GeV/c K/p up to 2.4 GeV/c 7s separation of p/p at 3 GeV/c 3 GeV beam particles data p p Separate p/p (K/p) at low momenta (04.5 GeV/c) 42 slabs of fast scintillator read at both ends by PMTs PMT Scintillator Pion yield: K2K thin target Use K2K thin target (5%l) To study primary p-Al interaction To avoid absorption / secondary interactions 5%l Al target (20mm) Raw data p > 0.2 GeV/c y < 50 mrad 25 < x < 200 mrad K2K replica (650mm) 0 4 2 6 P(GeV/c) 8 10 0 100 200 -100 -200 qx(mrad) p-e/p misidentification background Y. Fisyak Brookhaven National Laboratory R. Winston EFI, University of Chicago M.Austin,R.J.Peterson University of Colorado, Boulder, E.Swallow Elmhurst College in addition to EFI W.Baker,D.Carey,J.Hylen, C.Johnstone,M.Kostin, H.Meyer, N.Mokhov, A.Para, R.Raja,S. Striganov Fermi National Accelerator Laboratory G. Feldman, A.Lebedev, S.Seun Harvard University P.Hanlet, O.Kamaev,D.Kaplan, H.Rubin,N.Solomey, C.White Illinois Institute of Technology U.Akgun,G.Aydin,F.Duru,Y.Gunyadin,Y.Onel, A.Penzo University of Iowa N.Graf, M. Messier,J.Paley Indiana University P.D.BarnesJr.,E.Hartouni,M.Heffner,D.Lange,R.Soltz, D.Wright Lawrence Livermore Laboratory R.L.Abrams,H.R.Gustafson,M.Longo, H-K.Park, D.Rajaram University of Michigan A.Bujak, L.Gutay,D.E.Miller Purdue University T.Bergfeld,A.Godley,S.R.Mishra,C.Rosenfeld,K.Wu University of South Carolina C.Dukes, H.Lane,L.C.Lu,C.Maternick,K.Nelson,A.Norman University of Virginia ~50 people, 11 graduates students, 11 postdocs. MIPP :Physics Program Particle Physics-To acquire unbiased high statistics data with complete particle id coverage as long as hadron interactions. Study non-perturbative QCD hadron dynamics, scaling laws of particle production Investigate light meson spectroscopy, pentaquarks, glueballs Nuclear Physics Investigate strangeness production in nuclei- RHIC connection Nuclear scaling Propagation of flavor through nuclei Netrinos related Measurements Atmospheric neutrinos Cross sections of protons in addition to pions on Nitrogen from 5 GeV- 120 GeV (5,15,25,5070,90) GeV Improve shower models in MARS, Geant4 Make measurements of production of pions as long as neutrino factory/muon collider targets MINOS target measurements pion production measurements to control the near/far systematics Complementary with HARP at CERN E910 Note added after end of talk: The nw BNL measurements with the E910 experiment have been reported by J. Link at NuFact 2004 in WG2 Summary HARP 3-15 GeV at CERN PS MIPP 5-120 GeV at FNAL MI NA49 100,160 GeV at SPS
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