SUMMARY (EXPERIMENT)

S.Bianco - HADRON 2011 - Summary (Experiment) 1

SUMMARY (EXPERIMENT)

• INLOOK

• SYNOPSIS

• OUTLOOK

Stefano BiancoLaboratori Nazionali di Frascati dell’INFN


INLOOK SWANSON HADRON09


SYNOPSIS

• 37 plenary talks

• 128 parallel talks

• 36 poster presentations


THE LIGHTEST (?) LASSERRE


THE LIGHTEST (?) LASSERRE


VERY LIGHT - The Shrinking Proton

• CREMA Collaboration

• A new determination of the proton radius via the Lamb shift in muonic hydrogen

• Proton is 4% smaller, and Rydberg constant is 5sigma off.

POHL






LIGHT MESONS & BARYONS

• Pion diffraction

• Hypernuclei

• Suppression of jets @ LHC

• Resonances

• Quest for 5-quark

NEUBERT, BECK, TAKAHASHI, TAMURA, HICKS, SALABURA


LIGHT MESONS & BARYONS

NEUBERT


Electromagnetic excitation off the neutronElectromagnetic excitation off the neutron

ηγ ++→+ pnd

quasifree η photoprodruction:

Narrow structure in nη - final state

)(25

1670

FWHMMeW

MeVW

≈≈

σ

Publication:I. Jaegle, B. Krusche, … accepted by EPJA

Crystal Barrel at ELSA result BECK


Status on Meson Photoproduction Status on Meson Photoproduction

Nearly completedata base

Complete data base

Only a few experiments

Crystal Barrelat ELSA

CLASat JLAB

Crystal Ballat MAMI

BECK


p(π-,K-)X Missing Mass

Preliminary

• Expected resolution 1.5MeV/c2

• No peak structure was observed. Present upper limit ~ 0.3b/sr (averaged 2―15°)

~0.3b (isotopic K distribution)

TAKAHASHI


HICKS


HICKS


HICKS


HICKS


HICKS


N

Z

World of matter made of u, d, s quarksNu ~ Nd ~ Ns

Higherdensity

３ -dimensional nuclear chart

, Hypernuclei

, Hypernuclei

Str

ang

enes

s

0

-1

-2

“Stable”

by M. Kaneta inspired by HYP06 conference poster

Strangeness in neutron stars ( > 3 - 4 0 )

Strange hadronic matter (A → ∞)

TAMURA


Overview of Strangeness Nuclear Physics Experiments

• K- or +/- beams KEK-PS, BNL-AGS => J-PARC and hypernuclear spectroscopy, γ-spectroscopy of hypernuclei and hypernuclei [Takahashi], weak decays of hypernuclei K- nuclei [Fujioka], K- atoms,

• e- beam Jefferson Lab (Hall A, Hall C), MAMI-C high-res. hypernuclear spectroscopy, weak decays

• K- from DANE (FINUDA, SIDDHARTA, AMADEUS) spectroscopy of hypernuclei [Botta,Bonomi]

weak decays of hypernuclei [Bufalino]

K- nuclei, K- atoms [Ishiwatari,Okada],

• Heavy ion beams GSI (HypHI) Heavy-Ion induced production, lifetimes,.…

TAMURA


Neutron-rich hypernuclei

First data on n-rich hypernucleus

10B (-, K+) 10Li

Almost no background

Saha et al., PRL 94 (2005) 052502

11.1±1.9 nb/sr

KEK E521, K6+SKS

p~1.2 GeV/c

Physics Interest

coherent coupling -> NN attraction

important in neutron stars

Cross section sensitive to - admixture in hyp.

n-halo disappear by

Akaishi et al., PRL 84 (2000) 3539

New data from FINUDA – 6

H suggested by 6Li(Kstop,) E. Botta, Monday

- p p -> n K+

2-step charge exchange -p->0n, 0p->K+etc.) Via - admixture in hyp. - p->- K+, - p<->n)

TAMURA


- momentum (MeV/c)

- momentum (MeV/c)

+ momentum (MeV/c)

3 candidate events2.7 107 K-

stop events

249÷255 MeV/c (σp=1.1 MeV/c)

130÷138 MeV/c (σp=1.2 MeV/c)

XIV International Conference on Hadron Spectroscopy

PreliminaryPreliminary

6H

E.Botta - Parallel


MotivationR. Rapp, J. Wambach, Adv. Nucl. Phys. 25 (2000) P. Muehlich et al. NPA 780(2006)

meson

• Many predictions for sizable modifications of meson spectral function A(m, p) in

cold and hot nuclear matter: broadening and „dropping mass” scenarios

A(m,p) QCD vacuum properties via QCD sum rules (B. Kaempfer talk)

• Experiments: γ+A, p+A, A+A mesons: ,, , η, η’

cold matter, Spring8, CLAS @ JLAB, CBELSA/TAPS, : KEK E325 , ANKE, HADES

HI collisions: DLS, HADES, Helios, CERES, Na60, STAR, PHENIX, LHC..

mesonat rest

p = 0.3 GeV/c

„hot and dense matter”

„cold matter”

TALABURA


Summary

• Meson transparency in cold nuclear matter shows increased meson (, ,η, η’ ) widths in-medium

>> free

• Estimates of meson absorption cross sections in nucleus indicate σNV in-

medium > σNV free : significant role of n (>2)- particle interactions ?

• determination of -meson shape in cold nuclear matter requires better understanding of /N* -

Ne+e- transitions and role of secondary processes - important for HI collisions !

absorption observed in HI collisions (low pt ) , no effects found for

• e+e- excess in A+A collisions is related to recreation of short lived resonances : „resonance”

clock” : at SPS and baryonic resonances, ( ) at SIS18

• melting of the meson in hot and dense matter (SPS) is dominated by baryonic effects in

agreement with „hadronic” scenario

TALABURA


STRUCTURES, FORM FACTORS, …PRETZ, ASCHENAUER, SELYUZHENKOV


PRETZ


Transverse single-spin asymmetries

E.C. Aschenauer Hadron, June 2011 - Munich 27

ANL ZGSs=4.9 GeV

BNL AGSs=6.6 GeV

FNAL s=19.4 GeV

BRAHMS@RHIC s=62.4 GeV

left

right

0

Big single spin asymmetries in pp !!

Naive pQCD (in a collinear picture) predicts AN ~ smq/sqrt(s) ~ 0

What is the underlying process?Sivers or Twist-3 or Collins or ..

Do they survive at high √s?

ASCHENAUER


What is seen at RHIC

E.C. Aschenauer Hadron, June 2011 - Munich 28

No strong dependence on s from 19.4 to 200 GeV Spread probably due to different acceptance in pseudorapidity and/or pT xF ~ <z>Pjet/PL ~ x : shape induced by shape of Collins/Sivers Sign also consistent with Sivers and/or Transversity x Collins

need other observables to disentangle underlying processesDo we understand the theory

ASCHENAUER


SELYUZHENKOV


SELYUZHENKOV


CHARMGAO, LI, KHUR


CHARM

K.Seth parallel


CHARMLI


LI


LI


LI


LI


LI


CHARM @ LHCGAO


GAO


GAO


GAO


GAO


GAO


KUHR


BEAUTYPATRIGNANI, LEONARDO, EVANS, KHUR


KUHR


BEAUTY PATRIGNANI


BEAUTYLEONARDO


LEONARDO


LEONARDO


LEONARDO


LEONARDO


LEONARDO


LEONARDO


EVANS


EVANS


EVANS


EVANS


A,B,C,…X,Y,Z,…Xb,Yb,Zb,…EIDELMAN, PATRIGNANI, GAO, LEONARDO, LI


EIDELMAN


LI


LI


GAO


EIDELMAN


EIDELMAN

See also M.Karliner et al., HH parallel Friday


OUTLOOK

• JPARC

• GLUEX@JLAB

• SuperFlavourFactories– SUPERKEKB– SUPERB (Parallel A.Feliciello, )

• PANDA

TAKAHASHI, SCHMITT, SHWARTZ, TAMURA


K1.8

K1.8BRKL

K1.1BR

High-p

Line（ Pla

n ）

K1.1

Beam Dump

T1-Target

Nuclear & Hadron Physics Nuclear & Hadron Physics at Hadron Hallat Hadron Hall

Hypernuclear Physicsγ-ray spectroscopyof hypernuclei

(Multi-strangeness)Hypernuclei

6He

Double-

Exotic Hadrons

dd

uuuu

dd

ss

Pentaquark +

K N Interaction

Kaonic atom

c

K− Meson

X-rayNucleus

Kaonic nuclei

Origin of Hadron Mass

In-medium meson mass

K0 → π0νν

Kaon rare decay

T-violation

TAKAHASHI


OUTLOOK SCHMITT


Challenges (K.Seth, HADRON 2007)

• GE (proton) for spacelike momentum transfers• GM(tlike)=2GM(slike)• Nucleon spin and • N* resonance• C & b baryons• Baryonium, dibaryons• Mesons ff• Scalars σf0, a0, Kkbar molecules• F0(1370), f0(1500) and the glueballs• Open flavor mesons and D**• Bc• Charmonium spin triplets• etac’ and hc 1P1• X,Y,Z• X(3872), Y(4260)• Etab, upsilon• QGP, attenuation


1.Synergy

• The spectroscopy community and the flavour/NewPhysics/CPV communities need to find synergies

• A better understanding of chiral dynamics and of scalar dynamics is needed as help not only to find NewPhysics (where CPV has a fundamental role) but also to identify it.

• Each NewPhysics introduces a large number of new masses, mixing angles etc etc. These have to be studied in flavour dynamics

• A case study for discussion: eta/eta’ mixing (C.DiDonato et al., HH1 parallel) as a study propedeutical for a better understanding of the eta and eta’ wave functions which affect CP-violating asymmetries in decays B-->eta’Ks and B-->etaKs.

• Super Flavour Factories (Superb and SuperKEK) will have a strong role in spectroscopy AND weak decays


2.Tools

• The HEP community in its quest for NewPhysics/CPV need to acquire tools specific of the chiral dynamics community

• Studying 2-body decays is not enough, 3 and 4 bodies transitions are needed therefore we need:

– Dalitz plots– PWA

• Seminal proposals at HADRON2011:– B.Kubis The role of final-state interactions in Dalitz

plot studies reporting on the activity of Les Nabis group (parallel HH1)– N.Berger Partial Wave Analysis using Graphics Cards

(parallel Technologies)


Partial Wave Analysis


3.Statistics, statistics, statistics

• Spectroscopy and NewPhysics require lots of data to nail down parameters

• Increase of luminosity in LHC will force the raising of trigger thresholds. Inclusive studies will be no longer possible. Experiments will concentrate on exclusive. Some experiments will suffer more than others ? How to accommodate HeavyFlavours spectroscopy studies and NewPhysics searches ?


4.Solidarity


The Earthquake on March 11

Entrance of LINIC Building

RCS Substation

CCRNeutrino Beam Dump

Hadron Switch Yard

Spring water from MR

Outskirt of Hadron Hall

The serious damages are LINAC Power lines, alignment of the elements RCS Power supplies, Cooling-water

In Hadron Facility, alignment of the primary & secondary beamline elements is necessary.

TAKAHASHI


TAKAHASHI


5. HADRON 2011

• Perfect organization• But not only: the main

asset of the conference is the great attendance of young students and postdocs


THANK YOU


spare

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SUMMARY (EXPERIMENT)