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Esperimenti Hypernuclei Pb-QuasiElastico PVES/PREX Form Factors @ 12GeV Apparati SBS Front Tracker. JLab12 / 2 A parte. Evaristo Cisbani / Roma gruppo collegato Sanità. Gradi di libertà nucleari. Gradi di libertà nucleonici. Milestones / Richieste Finanziarie. 21 Set 2009 / CSN III.

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JLab12 / 2 A parte

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Jlab12 2 a parte

Esperimenti

Hypernuclei

Pb-QuasiElastico

PVES/PREX

Form Factors @ 12GeV

Apparati

SBS Front Tracker

JLab12 / 2A parte

Evaristo Cisbani / Roma gruppo collegato Sanità

Gradi di libertà nucleari

Gradi di libertà nucleonici

  • Milestones / Richieste Finanziarie

21 Set 2009 / CSN III

JLab12 - E. Cisbani

1


Jlab12 2 a parte

Hypernucleus

N … N

L

Kaon detected

by HRSk

K+

Scattered electron

Detected by HRSe

L

g*

e’

p

beam

p

N … N

e

Nucleus

Electroproduction of Hypernuclei in HallA

Study L-N Interaction potential

  • Reactions Investigated:

    9Be9LiL (spin doublets, information on s-s)

    12C12BL (comparison with previous data: better understanding of results with hadron probesand Hall C at JLab)

    16O16NL (precise determination of L binding energy)

  • Experimental requirements:

    • Excellent Energy Resolution

    • Detection at very forward angles (6° to obtain practical counting rates septum magnets)

    • Excellent Particle Identification, unambiguous kaon selection RICH

    • High luminosity

Adapted from: F. Cusanno, Hyp-X Conference, Tokai, Ibaraki, Japan, 15th of September, 2009

21 Set 2009 / CSN III

JLab12 – Hypernuclei - E. Cisbani

2


Jlab12 2 a parte

Results on 16O target – Hypernuclear Spectrum of 16NL

Theory

Fit

/ 13.76 ±0.16

Binding Energy BL=13.76 ± 0.16 (stat) ± 0.05 (sys) MeV

Measured for the first time with this level of accuracy

  • Fit to the data (red line): Fit 4 regions with 4 Voigt functions  c2/ndf = 1.19

  • Theoretical model (blu line) based on :

    • SLA p(e,e’K+) (elementary process)

    • N interaction fixed parameters from KEK and BNL 16O spectra (J. Millener)

Adapted from: F. Cusanno, Hyp-X Conference, Tokai, Ibaraki, Japan, 15th of September, 2009

Paper resubmitted to PRL

21 Set 2009 / CSN III

JLab12 - Hypernuclei - E. Cisbani

3


Jlab12 2 a parte

JLAB Hall AE-94107: PreliminaryResults on 9Be target

Theory

(J. Millener and M. Sotona)

Preliminary

Fit (fourpeaks)

TO DO:

Use Be windows data

of waterfall target to increase statistics

Adapted from: F. Cusanno, Hyp-X Conference, Tokai, Ibaraki, Japan, 15th of September, 2009

21 Set 2009 / CSN III

JLab12 - Hypernuclei - E. Cisbani

4


Jlab12 2 a parte

E-07-012 - The Angular Dependence of

16O(e,e’K)16NLand 1H(e,e’K)L

Will run right before 6 GeV shutdown

  • These data and, especially, the ratio of HN to the elementary cross section will give:

  • new valuable information on hypernuclear structure (including spin assignment of produced hypernuclear states), and reaction mechanisms

  • the modification of the dynamics of the (e,e’K+) process in the nuclear medium.

Parasitic test for E-08-012 Study of Light Hypernuclei by Pionic Decay at JLab

21 Set 2009 / CSN III

JLab12 - Hypernuclei - E. Cisbani

5


Jlab12 2 a parte

(Pb-QE)

Studio correlazione long-range e dinamica relativistica nel mezzo nucleare

Adapted from Guido Urciuoli

21 Set 2009 / CSN III

JLab12 – PbQE - E. Cisbani

6


Esperimenti di violazione della parit

Esperimenti di Violazione della Parità

  • Misura accurata della asimmetria nei processi elastici (e DIS) di elettroni polarizzati longitudinalmente su nucleone/nucleo non polarizzato

  • Accesso alle costanti di accoppiamento deboli elettroni-quark (u/d) delle correnti neutre, ovvero alla corrente debole del protone, ovvero all’angolo di mixing debole

  • Pone limiti su esistenza di nuova fisica (PVDIS, QWeak, Möller)

  • Ha permesso la misura del contributo dei quark s ai fattori di forma del nucleone (HAPPEX, G0)

  • Permette la misura di importanti grandezze nucleari soppressi nei processi elettromagnetici  PREX

21 Set 2009 / CSN III

JLab12 – PVES - E. Cisbani

7


Violazione di parit e l angolo di mixing a basse energie

Violazione di Parità e l’angolo di mixing a basse energie

Programma rilevante delle sale A e C

21 Set 2009 / CSN III

JLab12 – PVES - E. Cisbani

8


Jlab12 2 a parte

Lead(208Pb) Radius Experiment: PREX

Elastic Scattering Parity Violating Asymmetry

E = 850 MeV, J=6° electrons on lead

Clean Probe Couples Mainly to Neutrons

(T.W. Donnelly, J. Dubach, I. Sick)

In PWIA:

208Pb

w/Coulomb distortions (C. J. Horowitz) :

In run primavera 2010

  • Implicazioni su equazione di stato stelle neutroni

  • Propedeutico per test standard model

Adapted from Guido Urciuoli

21 Set 2009 / CSN III

JLab12 – PVES/PREX - E. Cisbani

9


Fattori di forma elettromagnetici del nucleone

Fattori di Forma Elettromagnetici del Nucleone

Nella separazione Rosenbluth l’approssimazione di singolo fotone scambiato non sembra adeguata

Trasferimento di polarizzazione dalla sonda elettronica al protone diffuso elasticamente

Evidente discrepanza tra i due metodi di misura. Mal comprensione dei meccanismi di QED nei processi elastici!

+ nuove informazioni nello studio della struttura del nucleone

21 Set 2009 / CSN III

JLab12 – [email protected] - E. Cisbani

10


Approved ff experiments @ 12 gev

Approved FF Experiments @ 12 GeV

  • E12-07-109: GEp up to 14.5 GeV2 by recoil-polarization

    • Require high lumi (low analyzing power and elastic cross section ~ E2beam/Q16

  • E12-09-016: GEn/GMn up to 10 GeV2 by beam-target double-polarization:

    • Polarized 3He, neutron detector

    • Doulbe Spin Asymmetry ~ GE/GM

  • E12-09-019: GMn up to13.5→18 GeV2 by cross section ratio D(e,e’n)/D(e,e’p)

    • High luminosity; neutron detector

+ SIDIS @ 12 GeV (see Patrizia Rossi)

 New SBS Spectrometer

21 Set 2009 / CSN III

JLab12 - [email protected] - E. Cisbani

11


Em ff perch alti q 2

EM FF: Perché alti Q2

  • Test per molti modelli fenomenologici.

  • Studio regione di transizione tra la descrizione non- e perturbativa della QCD

  • Constraint of the H and E GPD

21 Set 2009 / CSN III

JLab12 - [email protected] - E. Cisbani

12


New sbs spectrometer gep5 conf

New SBS Spectrometer (GEP5 Conf.)

  • Alta Luminosità (1038 /cm2/s)

  • Angoli molto in avanti

  • Moderatamente larga accettanza

  • Buona risoluzione in momento (0.5% a 4-8 GeV/c)

  • Buona risoluzione angolare 0.2 mrad

  • Flessibilità (possibilità di riconfugurare i rivelatori in modo ottimale

Responsabili dello sviluppo del tracciatore GEM

+ design elettronica per tutti i rivelatori GEM

hallaweb.jlab.org/12GeV/SuperBigBite/

21 Set 2009 / CSN III

JLab12 – SBS Tracker - E. Cisbani

13


Sbs tracking requirements

SBS Tracking Requirements

… and modular: reuse in different geometrical configuration

MPGD = Micro Pattern Gas Detector (GEM, Micromegas …)

21 Set 2009 / CSN III

JLab12 - SBS Tracker - E. Cisbani

14


Gem for sbs

GEM for SBS

  • Standard 3 GEM foils

  • 2D Readout plane, 0.4 mm pitch

  • Approx. 50000 channels

  • Chamber made by 40x50 cm2 modules

  • Minimize frames (8 mm width)

  • Minimize front-end electronics size

  • Minimize cabling

  • Optimize HV distribution

  • Sezioni coinvolte: BA + CT + GE + ISS

21 Set 2009 / CSN III

JLab12 - SBS Tracker - E. Cisbani

15


Gem prototype 0 and 1

GEM: Prototype 0 and 1

  • First 10x10 prototypes under cosmic test

  • Using 70/30 Ar/CO2 gas mixture

  • 7 Independent HV levels up to ~ 5000 V

Assembling the GEM chambers parts require a careful quality control at several check points and specific tools for gluing, heating, testing, cleaning

Final 40x50 cm2 module finalized; GEM foils and readout ordered

21 Set 2009 / CSN III

JLab12 - SBS Tracker - E. Cisbani

16


Small silicon detector

SD

(x/y)

Chamber doublet

Dipole

Track

Angular Range

+ Small Silicon Detector

21 Set 2009 / CSN III

JLab12 - E. Cisbani

17


Jlab12 2 a parte

2000 ch.

FE

10cm

FE

50mm

2000 ch.

20cm

FE

2000 ch.

FE

2000 ch.

SiD Detector Layout (RM1)

~ 1 40x100 cm2 GEM chamber

Costo e X0 equivalenti

21 Set 2009 / CSN III

JLab12 - E. Cisbani

18


Sbs front tracker modellizzazione rec

SBS Front Tracker: Modellizzazione + Rec

Photons largest background (80%)

GEANT4 + Root

FEM

21 Set 2009 / CSN III

JLab12 - E. Cisbani

19


Sbs front tracker electronics

SBS Front Tracker Electronics

  • Use APV25 (CMS and COMPASS): 128 analog channels at 40 MHz; no real alternative existing

  • Compact FrontEnd card designed by GE

  • Cabling minimized by flexible backplane

  • Work in progress on ADC Module (for 16 APV25) in VME64x standard

  • Read both SiD e GEM

21 Set 2009 / CSN III

JLab12 - E. Cisbani

20


Sbs collaborazione internazionale

SBS: Collaborazione Internazionale

Progetto SBS in sottomissione al DOE da parte dei gruppi americani (CMU, UVA, W&M, NSU, Rutgers&UNH, JLab) per circa 3 M$ (+ contingenza)

+ Glasgow

+ FIU

21 Set 2009 / CSN III

JLab12 - E. Cisbani

21


Jlab12 milestones 2010

JLab12: Milestones 2010

21 Set 2009 / CSN III

JLab12 - E. Cisbani

22


Jlab12 richiesta finanziaria 2010

JLab12: Richiesta Finanziaria 2010

Capitoli vs Sottoprogetti

COL= Funzionamento collaborazione

GEM= Tracciatore per SBS

RICH= RICH per CLAS12

FT= Forward Tagger per CLAS12

CD= Central Neutron Detector

HD= HD-ice target

21 Set 2009 / CSN III

JLab12 - E. Cisbani

23


Jlab12 richiesta finanziaria 20101

JLab12: Richiesta Finanziaria 2010

Sezioni vs Sottoprogetti

  • Proposte dettagliate e basate in larga misura (ove applicabile) su offerte

  • Richiesta complessiva inferiore all’anno precedente

21 Set 2009 / CSN III

JLab12 - E. Cisbani

24


Conclusioni

Conclusioni

  • JLab ha un programma di upgrade avviato e finaziato interamente (si pensa già al futuro prossimo con EIC)

  • Offre e continuerà ad offrire una vasta gamma di opportunità di fisica dal subnucleare ai processi elettrodeboli

  • La collaborazione italiana ha un ruolo rilevante in diversi campi di indagine di punta per il laboratorio

21 Set 2009 / CSN III

JLab12 - E. Cisbani

25


Support slides

Support Slides


Sbs front tracker project

SBS Front Tracker Project

BA: Gas system + Electronics (FE chips)

CT: Mechanics + Test + MC + Slow Control + (Ele)

GE: Electronics

ISS/ROME: Prototyping, Test, Digitization + Reconstruction, Evaluate/Prototype SiD, Coordination

21 Set 2009 / CSN III

JLab12 - E. Cisbani

27


Jlab12 2 a parte

Hall A E-94-107 High Resolution Hypernuclear Spectroscopy

e’

e

K+

p

L

16O(e,e’K)16NL

12C(e,e’K)12BL

  • separation between 3rd and 4th peak and narrow 4th peak  very small pLspin-orbit splitting

  • - binding energy BL=13.76±0.15 MeV

  • for the first time with this level of accuracy

  • energy resolution = 650 KeV/c

  • the best achieved in hyp. prod.

  • - first clear evidence of core excited states with high statistical significance

understanding of the elementary reaction on proton, poorly known

JLab12 - ISS & RM / E. Cisbani


Jlab12 2 a parte

Results on 16O target – Hypernuclear Spectrum of 16NL

[1] O. Hashimoto, H. Tamura,

Part Nucl Phys 57, 564 (2006)

[2] private communication from

D. H. Davis, D. N. Dovee, fit

of data from Phys Lett B 79, 157

(1978)

[3] private communication from

H. Tamura, erratum on Prog

Theor Phys Suppl 117, 1 (1994)

[2]

[1]

[3]

Difference expected with respect to mirror nucleus:

400 – 500 keV (M. Sotona)

E94-107

(Kstop,p-)

(K-,p-)

(p+,K+)

Comparison with the mirror nucleus 16OL

Paper (re)submitted to

Phys Rev Lett

F. Cusanno, Hyp-X Conference, Tokai, Ibaraki, Japan, 15th of September, 2009


Prex neutron stars

PREX & Neutron Stars

( C.J. Horowitz, J. Piekarweicz )

R calibrates EOS of Neutron Rich Matter

N

Crust Thickness

Explain Glitches in Pulsar Frequency ?

Combine PREX R with Obs. Neutron Star Radii

N

Phase Transition to “Exotic” Core ?

Strange star ?Quark Star ?

Some Neutron Stars seem too Cold

Cooling by neutrino emission (URCA)

0.2 fm URCA probable, else not

Crab Pulsar


Jlab12 2 a parte

  • Atomic Parity Violation

  • Low Q test of Standard Model

  • Needs R to make further progress.

2

Isotope Chain Experiments e.g. Berkeley Yb

N

APV


Jlab12 2 a parte

  • Atomic Parity Violation

  • Low Q test of Standard Model

  • Needs R to make further progress.

2

Isotope Chain Experiments e.g. Berkeley Yb

N

APV


Proximity rich preliminary performance

Proximity RICH / Preliminary Performance

Transversity Experiment data taking completed in Feb/09

p

K

Mean number of PhotoElectrons for p: NPE~ 9

Error in angle reconstruction: sJp < 7 mr  nsp-K~ 4.5 s

JLab12 - ISS & RM / E. Cisbani


Jlab12 2 a parte

JLAB Hall AE-94107: PreliminaryResults on 9Be target

Red line: Bennhold-Mart (K MAID)

Blue line: Sagay Saclay-Lyon (SLA)

Curves are normalized on g.s. peak.

Theory

(J. Millener and M. Sotona)

Counts / 150 keV

Counts / 200 keV

Preliminary

Fit (fourpeaks)

Energy levels

Energy levels

Missing energy (MeV)

F. Cusanno, Hyp-X Conference, Tokai, Ibaraki, Japan, 15th of September, 2009


Jlab12 2 a parte

E-07-012 - The Angular Dependence of 16O(e,e’K)16NLand 1H(e,e’K)L

Analysis of the 9Be(e,e’K)9LiL

Complex structure, different fits can be compared with the theoretical curve

These data and, especially, the ratio of HN to the elementary cross section will give new valuable information on hypernuclear structure (including spin assignment of produced hypernuclear states), reaction mechanisms and, even possibly the modification of the dynamics of the (e,e’K+) process in the nuclear medium.

Parasitic test for E-08-012 Study of Light Hypernuclei by Pionic Decay at JLab

10 Jul 2009

JLab12 - ISS & RM / E. Cisbani

37


Jlab12 2 a parte

38


Jlab12 2 a parte

Detector optimisation and calibration completed

first draft paper on Q2 dependence ready; 2 additional papers will follow

10 Jul 2009

JLab12 - ISS & RM / E. Cisbani

39


Nuova strumentazione per sala a

Nuova strumentazione per sala A

  • Gli esperimenti sulla struttura dei nucleoni TMD (SIDIS) e FF (scattering elastico) richiedono un nuovo spettrometro:

    • a larga accettanza (angolo e momento)

    • in grando di supportare luminosità di 1038 cm-2s-1

SBS in configurazione SIDIS

Prototipo GEM

hallaweb.jlab.org/12GeV/SuperBigBite/

10 Jul 2009

JLab12 - ISS & RM / E. Cisbani

40


Recoil polarization method

Recoil Polarization Method


Modulo gem 40x50 cm2

Modulo GEM40x50 cm2

  • Frame da 8 mm

  • Elettronica a 90 gradi rispetto alla superfice utile su tutti i lati (richiesta per piani u/v con strip diagonali)

  • Connettori ZIF

21 Set 2009 / CSN III

JLab12 - E. Cisbani

42


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