the phenix experiment role of the particle identification

12
The PHENIX experiment Role of the Particle Identification at high Pt Aerogel Cerenkov detector Design Test-beam performance Outlooks Extended Pid in PHENIX (BNL, Dubna, Tokyo, Tsukuba) E.Kistenev for the PHENIX High Pt Upgrade Project CIPANP 2003

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Page 1: The PHENIX experiment Role of the Particle Identification

•T

he P

HE

NIX

exp

erim

ent

•R

ole

of th

e Pa

rtic

le Id

entif

icat

ion

at h

igh

Pt•

Aer

ogel

Cer

enko

vde

tect

or•

Des

ign

•T

est-

beam

per

form

ance

•O

utlo

oks

Ext

ende

d Pi

d in

PH

EN

IX(B

NL

,Dub

na, T

okyo

, Tsu

kuba

)

E.K

iste

nev

for t

he P

HEN

IX H

igh

Pt U

pgra

de P

roje

ct

CIP

AN

P 20

03

Page 2: The PHENIX experiment Role of the Particle Identification

trac

king

:D

C,P

C1,

PC

2, P

C3

elec

tron

Id:

RIC

H,

EM

Cal

, TE

Cph

oton

s:E

MC

alch

arge

d ha

dron

Id:

Aer

ogel

, RIC

H, T

EC

, EM

Cal

PHE

NIX

at R

HIC

Page 3: The PHENIX experiment Role of the Particle Identification

Exte

ndin

g PH

ENIX

Rea

chEx

tend

ing

PHEN

IX R

each

Ext

endi

ng P

id to

10

GeV

/c w

ill e

nhan

ce–

Jet t

aggi

ng –

initi

al v

s fin

al st

ate

part

onic

evo

lutio

n;–

Cha

rm &

bea

uty

mea

sure

men

t in

Au+

Au

colli

sion

s ->

ener

gy lo

ss o

f cha

rm/b

eaut

y in

hot

mat

ter;

−∆G

mea

sure

men

t by

heav

y qu

ark

prod

uctio

n in

wid

e x

rang

e;–

Glu

on sh

adow

ing

in w

ide

x ra

ngePr

esen

t pT

rang

e w

ith P

ID :

π/K

up

to 2

GeV

/c

p/(π

+K) u

p to

4.5

GeV

Page 4: The PHENIX experiment Role of the Particle Identification

PHE

NIX

Hig

h Pt

Upg

rade

Pro

ject

Page 5: The PHENIX experiment Role of the Particle Identification

01

23

45

67

89

1002468101214161820

pion

(n=1

.015

)

pion

(n=1

.010

)

pion

(CO

2,n=

1.00

041)

kaon

(n=1

.015

)

kaon

(n=1

.010

)

prot

on(n

=

1.01

5)

prot

on

(n=1

.010

)

Mom

entu

m(G

eV/c

)

N p.e.A

erog

elde

tect

or b

uild

ing

bloc

ks

Goa

l: K

-thr

esho

ld c

lose

to 5

GeV

/c

Page 6: The PHENIX experiment Role of the Particle Identification

Che

renk

ov e

mis

sion

in A

erog

el

•It

is C

here

nkov

Em

issi

on.

+

−=

2

22

2m

ax1

1p

pm

nN

N

Lig

ht y

ield

vsM

omen

tum

L

ight

Yie

ld v

s Ref

ract

ive

inde

x

Nph

oton

visi

ble

≈50

0sin

c [1

/cm

]

ϑc

=C

os−1

(1 n β

)

Nm

ax=

500

×q.e

.×12

[cm

]≈

1200

p.e

.D

ata

from

Bel

le, s

lide

from

Ya.

Mia

ke

PHE

NIX

Aer

ogel

n=

1.01

2

Page 7: The PHENIX experiment Role of the Particle Identification

Aer

ogel

Det

ecto

r R&

D –

Test

Bea

m a

t KE

K

Page 8: The PHENIX experiment Role of the Particle Identification

Ligh

t Yel

d D

epen

denc

e on

Aer

ogel

Sta

ck T

hick

ness

•Li

ght Y

ield

satu

rate

s at ~

12

cm d

epth

•Sc

atte

ring

dom

inat

es in

ligh

t los

ses

3 G

eV/c

pio

ns

n =

1.01

7

R62

33(3

”,no

n-U

V)

L

Λsc

att∝

λ4 , Λ

abs∝

λ2

Page 9: The PHENIX experiment Role of the Particle Identification

Uni

form

ity o

f the

Lig

ht Y

Ield

N=1

.014

Page 10: The PHENIX experiment Role of the Particle Identification

Ligh

t yie

ld a

nd c

ount

er o

rien

tatio

n

Aer

ogel

Bea

m

dire

ctio

n

Page 11: The PHENIX experiment Role of the Particle Identification

Tim

ing

in a

erog

el d

etec

tor

-bet

ter t

hen

the

coun

ter s

ize

track

mat

chin

g

-bac

kgro

und

reje

ctio

n

Subn

anos

econ

d re

solu

tion

mea

sure

d w

hen

timin

g on

firs

t ph

otoe

lect

on

Page 12: The PHENIX experiment Role of the Particle Identification

PHE

NIX

PID

in R

un4

and

beyo

nd …

5 -9

1 -5

n=1.

01γt

h~8.

5A

erog

el

17 -

5 -1

7n=

1.00

044

γth~

34R

ICH

-50

-2.5

σ~

100

psTO

F

Kao

n-Pr

oton

sepa

ratio

nPi

on-K

aon

sepa

ratio

n

04

8

04

8

04

80

48

04

8

04

8