CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 1
HERA and the LHC
K. GoulianosThe Rockefeller UniversityCERN 17-19 January 2005(talk delivered by video)
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 2
Thanks!
Many thanks toMichele Gallinaro
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 3
Run-I,0 (1988-89)Elastic, single diffractive, and total cross sections @ 546 and 1800 GeV
Roman Pot Spectrometers
Roman Pot Detectors Scintillation trigger counters Wire chamber Double-sided silicon strip detector
Results PRD 50 (2004) 5518; 5535; 5550 Total cross section tot ~ s Elastic cross section d/dt ~ exp[2’ lns] shrinking forward peak Single diffraction Breakdown of Regge factorization
Additional DetectorsTrackers up to || = 7
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 4
CDF-IRun-IC Run-IA,B
Forward DetectorsBBC 3.2<<5.9FCAL 2.4<<4.2
1992-1996
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 5
CDF-I Roman Pot Spectrometer
•3 trigger counters•3x[2X(20+20)]=240 channels
Hosai Nakada – thesishttp://hep-www.px.tsukuba.ac.jp/research/thesis_d.html
Fiber width: 800
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 6
CDF Run I results
93(2004)141601
February 23, 2004 CDF Internal Review 7
Run-II Diffraction @ CDF
CDF Forward Detectors
MiniPlug calorimeters (3.5<<5.5) Beam Shower Counters (5.5<<7.5) Antiproton Roman Pot Spectrometer
2001-
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 8
M. Gallinaro @ http://arxiv.org/abs/hep-ph/0407255
Run-II Forward Detectors
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 9
MiniPlug Run -II Data
ADC counts in MiniPlug towersin a pbar-p event at 1960 GeV.• “jet” indicates an energy cluster and may be just a hadron.• Approximately 1000 counts = 1 GeVMultiplicity distribution in SD and ND events
MiniPlug tower structure
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 10
Diffractive Dijets
ND+SD & SD+MBoverlap events
~ 1SD
events
ondistributiXp
constantlog
1
d
d
d
dFlat region
s
eEΣξ
iηiTi
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Run II Roman Pot Tracking
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 12
Calibration of RP position
t=0t=-0.5
t=-0.5
fixed
x
pbarz
x
Method
Adjust x to get the steepest t distributionbte~
dt
dσ
CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 13
Roman Pot Distributions
edge effect
x
1
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Determining x from data
Method: maximize the t=0 value of d/dt
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HERA &Tevatron->LHCp
p IP