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

CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 11

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

CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 14

Determining x from data

Method: maximize the t=0 value of d/dt

CERN 17-19 Jan 2005 Alignment of CDF Run II Roman Pots K. Goulianos 15

HERA &Tevatron->LHCp

p IP