Nuclear Physics groupNuclear Physics group

Coordinator: Pasquale Di Nezza

LNF Scientific Commitee, November 22nd, 2007

Lab: LNGS Nuclear Physics FTE: res.+tech. 3.0

Lab: LNF, Nuclear Physics FTE: res.+tech. 8.0

AIACE

SIDDHARTA

GRAAL

VIP

Lab: JLab, Hadronic Physics FTE: res.+tech. 6.7

Lab: CERN, QGP Physics FTE: res.+tech. 6.9

Lab: LNF, Nuclear Physics FTE: res.+tech. 6.2

Lab: DESY, Hadronic PhysicsFTE: res.+tech. 5.0

Lab: GSI, Had/Nucl Physics FTE: res.+tech. 2.9

Lab: ESRF, Hadronic Physics FTE: res.+tech. 1.2

Total FTE

Res.+Tech 40.2

Technicians 6.3

• 5 experiments (over 8) have the national spokesperson @LNF: AIACE, HERMES, PANDA, SIDDHARTA and VIP

• Several important national and international responsibilities:ALICE (Management Board), AIACE (Scientific Committee), FINUDA (Spokesperson), HERMES (Deputy Spokesperson), PANDA (Deputy Spokesperson), SIDDHARTA (Spokesperson), VIP (Spokesperson), I3HP (Chair), ……

• 40.2 res+tech within LNF Nuclear Group:

Researchers

Staff

Temporary

I talians

Foreigners

0123456789

Aiace

Alice

Finuda

Gra

al

Her

mes

Panda

Siddhar

ta Vip

FTE

AIACE

ALICE

FINUDA

GRAAL

HERMES

PANDA

SIDDHARTA

VIP

Time schedule data taking1995 1997 1999 2001 2003 2005 2007 2009

>2014

>2013

The VIP ExperimentThe VIP Experiment((VIVIolation of the olation of the PPauli Exclusion Principle)auli Exclusion Principle)

LNF- INFN, Frascati and INFN, Trieste, Italy

SMI, Vienna,Austria; IFIN–HH, Bucharest, Romania

Univ. Neuchâtel, SwitzerlandGoalGoalperform an experimental test of the validity of the Pauli Exclusion Principle for electrons to 10-30

validity of Pauli principle in a >3 +1 dimensional space-time, strings, superstrings, …

Experimental methodExperimental methodsearch for anomalous X-ray transitions in copper (2p->1s with 1s already occupied by 2 electrons; have the energy displaced with respect to the “normal” one)

@ LNGS Laboratory@ LNGS Laboratory (since February 2006)) to reduce the X-ray background induced by cosmic rays

Validity limits before VIP: 2/2 < 1.7 . 10-26 PLB 1990

Resp: Spokesperson

Energy spectra for the VIP measurements with the VIP setup in laboratoryEnergy spectra for the VIP measurements with the VIP setup in laboratory

The subtracted spectrum: current minus no-current

282

105.42

Best limit on PEP violation

(factor 40 of improvement of the previous

published result)

Published Phys. Lett. B641 (2006) 18-22

292

1062

29

2

1062

+shielding

GrAAL Polarized photons (6.03 GeV) @ESRF for photonuclear

reaction studies.

0 on quasi free neutron

0.0

0.5

-0.5

0.0

0.5

-0.5

0.0

0.5

-0.5

45 90 135 45 90 135 45 90 135 45 90 135

0 cm

E = 0.693 GeV E = 0.709 GeV E = 0.750 GeV E = 0.786 GeV

E = 0.825 GeV E = 0.865 GeV E = 0.922 GeV E = 0.981 GeV

E = 1.045 GeV E = 1.130 GeV E = 1.248 GeV E = 1.400 GeV

• Polarization observables measurements for γp K+Λ and γp K+Σ0 for energies up to 1.5 GeV

EPJ A31 (2007) 79

Laboratory TJNAF (Newport News, Va -USA) / Hall B - CLAS CollaborationBeam e-, : Emax = 6 GeV

AIACE

Study of the hadron structure and of the strong interaction in terms of fundamental constituents

Physics goal

LNF resp: Chair Service Work Committee

Italian Coll. LNF & INFN e Universita’ di Genova FTE : 11.7 + 1.4 (tech)

AIACE EXPERIMENT

submitted published/accepted

5

10

15

2000 2001 2002 2003 2004 year2005 2006 2007

10

20

30

27 27

5 24

PRL

PLB

PRC

PRDEJP 1Other

Total publications as AIACE leading authors: 25/82 ~30% (9% members/tot)

+ 22 Technical Papers Start data taking: February 1998

…Just completed: Pentaquark

n→K-+)< 3nb

p→nb

UPPER LIMIT (95%CL)1.52 < M(+) < 1.56 GeV

(p→ < 1 nb

d→nb

M(nK+)(GeV)

Cou

nts

/4 M

eV

No pentaquark signals from CLAS high statistics measurements

M. Battaglieri, R. De Vita al et al. PRL 96, 042001 (2006)R. De Vita, M. Battaglieri et al. PRD 74, 032001 (2006)

V. Kubarovsky, M. Battaglieri, R. De Vita et al. PRL 97, 102001 (2006)

S. Niccolai, M. Mirazita, P. Rossi et al. PRL 97, 032001 (2006)

B. McKinnon, K. Hicks, N.Baltzell, D. Carman, M. Mestayer, T. Mibe, M. Mirazita, S. Niccolai, P. Rossi, S. Stepanyan, D.J. Tedeschi et al.PRL 96 (2006), 212001

Strangeness photoproduction: n → K+ Σ-

1) study the baryon resonances not otherwise revealed (non dacay),

2) obtain info about couplings of nucleon resonances to KY final states

Comprehensive study of e.m. strangeness production in Hall B on proton and neutron with polarized and unpolarized beam and targets

cos θKCM

arb

itra

ry u

nit

s

γn → K+ Σ-

World data on neutron

d/d: very few data in a very limited angular range

TOT: no data

Eγ : from threshold to 3.59 GeVθK

lab : from 10 to 140 degrees

Resp: Deputy Spokesperson

: the new antiproton facility: the new antiproton facilityFacility for AntiprotonFacility for Antiprotonand Ion Researchand Ion Research Primary Beams

Secondary Beams

Storage and Cooler Rings

perform high resolution spectroscopy with - p formation experiments:

ΔE ≈ Δ Ebeam

produce, with high yields, gluonic excitations: glueballs, hybrids, multi-quark states

σ ≈ 100 pb

study partial chiral symmetry restoration by implanting mesons inside the nuclear medium

produce hyperon-antihyperon taggable beams

perform high resolution spectroscopy with - p formation experiments:

ΔE ≈ Δ Ebeam

produce, with high yields, gluonic excitations: glueballs, hybrids, multi-quark states

σ ≈ 100 pb

study partial chiral symmetry restoration by implanting mesons inside the nuclear medium

produce hyperon-antihyperon taggable beams

pp

PANDA Straw Tubes Tracker

PANDA central tracking detector has to fill a cylindrical volume with an internal radius of 150 mm, external one of 420 mm, and a length of 1500 mm.Detector requirement are:

• Almost full angular coverage;• High momentum resolution, δp/p~1%;• High spatial resolution, σrφ~150μm, σz~1-

3mm;• Minimal detector material budget, X0~1%;

• High rate capability, 107ev/s;• Resistance against aging effects, 1-2

C/cm/year;

Activity @LNFFrascati, 05/06/07 – LNF/SPAS

Panda ST_Tracker

•Mechanical support•Electronic integration•Gas line paths and flow•Prototype construction

+cosmic rays test

Detector Layout

HERHERa a MEMEasurement of asurement of SSpin (DESY)pin (DESY)

180 members coming from 30 Institutes (12 Countries)

(INFN: Bari, LNF, Ferrara, Sanita’)

HERA shutdown: 2/7/2007

30% of publications have an LNF first author (6% members/tot)

•Hardware: e.m. Calorimeter (resp.), RICH, Recoil (resp: -det)

•Nuclear and exclusive analysis group coordinators

•Deputy Spokesperson, 2 Editorial Board Members, Executive Board Member

HERMES view at the nucleon HERMES view at the nucleon structurestructure

from unpolarisedDIS

first glimpse

directflavourdecomp.

new constrain on s

transversity isnon-zero!first T-odd DF inDIS

polarised DIS HERMES:

signals of GPDs Ju+Jd

a0

=0.330±0.025(exp)

Top cited+300

Top cited+100

Top cited+300

Top cited+100

Top cited+50

Space-time evolution of hadronization

HERMES provides information on partonic propagation, energy loss and scattering, and constraints in

pre-hadronic effects

HERMES kinematics is relevant to ion-ion mid-rapidity

Possibility to formulate consistent pictures of nuclear effects in cold

and hot nuclear matter

RHIC @ BNL (Au+Au 200GeV) ** Top Physics Story del 2005 per l’ American Physical Society

ddpdT

ddpNdpR

TNN

AA

TAA

TAA /

/)(

2

2

• Photons are not suppressed

• Only hadrons at high pT are

suppressed according to the pQCD +

propagation •Studies on the “surface” of the medium•The hot nuclear matter behaves as a

liquid (residual interaction) not as a gas!

ALICE @ LHCMotivations to built an e.m. calorimeter

•Higher pt

•Higher energy remove residual interaction•Full jet reconstruction•Full jet particle identification

?Jet Quenching

AlPbSteelScint.Fiber.

EmCal Structure

• -0.7< η< 0.7 e 0 < Φ < 2/3 opposite to PHOS• Support structure under installation• 11 SuperModules• 1 SM = 24x12 modules• 1 module = 4 channels • 1.2x104 total channels (granularity)

EmCal production @LNF

Fiber cutting and sputtering at Frascati

•WLS readout : continuous operation of 1 cutting-polishing-gluing and 1 sputtering station for WLS fibre bundles needed for 3 SM (124000 fibres, 3500 bundles)•Optical and mechanical coupling of bundle with APD for 3456 channels (3 SM)

Energy reconstruction, Energy reconstruction, linearity, uniformitylinearity, uniformity 80 GeV e @fixed position

Ereconstructed [GeV]

EMCal test beam sept/oct 2007 @cern SPS/PS

!caveats preliminary calibration,

beam momentum spread not unfolded

Management Board

Project Leader: T. Cormier10)

Deputy: N. Bianchi6), C. Roy3)

T. Awes9), P. Di Nezza6), P. Jacobs7), S. Kox2), R. Soltz8)

Alice-CERN Representative

Y. Schutz1)

Technical Coordinator

J. Rasson7)

Detector and strip Module

P. Di Nezza6)

V.Petrov10)

Electronics

T.Awes9)

Trigger

P.Jacobs7)

Off-line

G. Conesa6)

J.Klay8)

Mec. Engineering Integration

M. Dialinas3)

Scintill.

A.Pavlinov 10)

Y. Kharlov 20)

Fiber System

F.Ronchetti6)

I.Kotov17)

Module Test &

Characteriz.

A.Fantoni6)

xyz11)

Support

Structure

J.Berkowitz7)

SM Crate

A. Palmeri5)

J.Riso10)

1) CERN, 2) IN2P3-Grenoble,

3) IN2P3 Subatech, 4) IN2P3-Strasburg,

5) INFN-Catania, 6) INFN-Frascati,

7) LBNL, 8) LLNL, 9) ORNL, 10) WSU,

11)IHEP, 12)Creighton, 13)UCLA,

14)Univ. of .Huston, 15) KentState Univ.,

16) Purdue Univ., 17)Ohio State Univ.,

18)Univ. of Tennessee, 19)Univ. of Texas

FEE

Calibrate/Test

K.Read18)

J.Schambach19)

Conv. System

abc18)

A.Palmeri5)

Elect Commis.

xyz9)

J.Schambach19)

High Level

L.Ray19)

SM Mec. Integration

xyz2)

J.Riso10)

On-line

DAQ

D.Silvermyr9)

Slow Control

M.Cherney12)

D.Bonnet4)

SM Insertion tooling

H.Carduner3)

Technical Coordinator: J. Rasson7)

APD Test

A.Badala’5)

Ghazikhanian13

SM electr

Integrat/Test

xyz2)

abc9)

SM cosmic calibration

xyz2)

D.Silvermyr9)

LED system

xyz11)

Trentalange13)

Low Level

O.Bourrion2)

Trigger

Commision

S.Margetis15)

Simulation

B.Mayes14)

F.Wang16)

Infostructure

and tools

Pulvirenti5)

A.Pavlinov10)

Jets

M.Estienne4)

J.Putscke7)

Electrons

C.Pruneau10)

0/photons

Van.Leeuwan7

Delagrange3)

D.Hasch6)

Data QA/QC

C.Markert19)

Intallation

L.Lesitam1)

The Nuclear Physics group @LNF is

experiencing moments of

particular high activity, playing

major roles at international level

Pasquale Di Nezza LNF SC, Nov ’07