J-PARC HADRON PHYSICS PROGRAM

March 2, 2016 Shin’ya Sawada 澤田 真也 KEK (High Energy Accelerator Research Organization)

International Workshop on Progress on J-PARC Hadron Physics in 2016, Tokai 1

Contents

• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary

2

3 J-PARC Facility

(KEK/JAEA）

Bird’s eye photo in January of 2016

South to North

Experimental Areas

Neutrino Beams (to Kamioka)

JFY2009 Beams

Hadron Exp. Facility

Materials and Life Experimental Facility

JFY2008 Beams

3 GeV Synchrotron

JFY2007 Beams

Linac

Hadron Experimental Facility (Current Layout)

Hadron Hall

50GeV Synchrotron

Beam Dump

50GeV Tunnel

Ｔ１ Target (30/50% Loss)

Test BL

Hi-P BL

Extension SM1

(2% Loss) T0

0.1% Loss)

Switchyard

4

5

K1.8

KL

SKS

K1.8BR

Beam Lines

Experiment Secondary particles Max. Mom. Max. Intensity

K1.8 Hypernuclei, Hadron Physics with S

p, K, p (2 separators) < 2.0 GeV/c ~105 Hz for K+

K1.8BR Hadron Physics with S p, K, p (1 separator) < 1.0 GeV/c ~104 Hz for K+

K1.1BR Lepton Flavor violation p, K, p (1 separator) < 1.1 GeV/c ~104 Hz for K+

KL Neutral K rare decay Neural Kaon ~ 2 GeV/c ~106 Hz

Intense Kaon Beam in the momentum range of ̃ 1 GeV/c

Jan.2009

Oct.2009

Oct.2009

K1.1(plan)

Hadron Experimental Facility (HEF)

Contents

• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary

6

? Superconductivity

“Gas”

?

r

T

QGP

Compression by gravity

0

Hadron Baryon Meson

“Liquid (Liquid drop)”

Origin and evolution of （quark）matter in Universe

（Phase diagram)

Normal nuclei High-density mtter

Stars Neutron starts

重力圧縮 P.T. Quark stars*

quark matter

Cooling by

Phase transition

Nucleosynthesis

→ Fluid

Big Bang

s quark

Strangeness Physics （J-PARC）

Hadron Physics （J-PARC）

H, He→ Fe

Supernova Fe→ U

hadronization hadron mass, confinement

High-density nuclear matter Generalized nuclear force

Nuclear/Hadron Physics at HEF • Modern picture of nuclear force based on QCD

• Hypernuclear spectroscopy → YN/YY int. ⇔ lattice-QCD • g-ray spectroscopy(E13), double-strangeness system(E03/E05/E07/E42)

• YN scattering (E40) • Hadrons in vacuum and medium

• Exotic hadrons (E19) • In-medium property of hadrons

→ Chiral Symmetry Breaking (CSB) • meson-mass spectroscopy (E16)

• LNN three-body force • Phase diagram and Equation Of State (EOS) of quark (hadron)

matter • low-T high-r region － Strangeness physics

• n-rich L-nuclei (E10), multi-strangeness, KbarN interaction (E15/E17/E27/E31) • Hadronization phase － Hadron physics

• exotic hadrons (E19) , charmed baryon spectroscopy (E50)

Blue: performed or on-go Red: plan

L n

n p

L

n p

p

4LH 4

LHe

Results (1)

• E19:Search for Q+ by p-+p→K-X • No peak was observed - U.L. of cross section : 0.28mb/sr - U.L. of Q+ width: 0.36 (1.9) MeV for ½ + (½-)

• E10:Neutron-rich 6LH via the 6Li(p-,K+) • No peak was observed - U.L. of cross section :1.2nb/sr ⇔ Observation of 3 candidates by FINUDA ( PRL 108,04251(2012) )

2010, Jan.2012

Dec.2012-Jan.201

PRL 109, 132002(2012) PRC 90, 035205(2014)

PLB 729, 39 (2014)

Results (2)

Analysis of inclusive spectrum was also published. PTEP 2014, 101D03(2014)

p SN-LN cusp p Shift of Y* bump

Missing mass spectrum is obtained with two protons tag Observation of “K-pp”-like structure PTEP 2015, 021D01 (2015)

Binding Energy 95 (stat.) (syst.) MeV Width 162 (stat.) (syst.) MeV

+18 -17

+30 -21

+87 -45

+66 -78

10

L(1405)+p K-+p+p

Missing mass spectrum

Experimental Method • E27: Search for K-pp bound states by

the d(p+,K+) at Pp=1.7GeV/c

Jun. 2012

A positive signature of K-pp bound state was obtained. Comparison with other experiments and theoretical studies are necessary and important to establish K-

pp bound state.

Results (3) • E15: Search for K-pp bound

states by the 3He(K-,n)X→Lp

1st- stage RUN with 1% of the proposal

May 2013

“semi”-inclusive ~10MeV/c2 resolution

Contribution of S→np (No other contribution in a bound-region due to kinematical limitations)

Significant enhancements were observed in a bound-region

arXiv:1408.5637 [nucl-ex]

12

Hadron Beam Operation in 2015 2015 Renovation Test operation User operation

13

Jan. 6 7 8

Apr.

8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Restart of Hadron Beam Operation Renovation

Test operation

The first beam extraction to the Hadron hall (3kW) The first beam injection to the target

12kW test operation started.

24kW test operation started. Facility inspection for the license as a radiation facility

The certificate was issued.

• The whole system, including newly installed equipment, was checked during the test operation period.

• In each step of the beam power improvements, new target system, monitoring system, etc. were confirmed to work properly.

14

Jan. 6 7 8

Apr.

8 9

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Restart of Hadron Beam Operation

User operation restarted with the proton beam power of 24kW!

(Almost 2 years after the accident)

Development of Beam Intensity

41.6 kW

15

5.52s cycle 6s cycle

0500100015002000250030003500

0

10

20

30

40

50

2009/1/1 2010/1/1 2011/1/1 2012/1/1 2013/1/1 2014/1/1 2015/1/1

Accu

mul

ated

po

wer

(kW

*day

s)

Ave.

pow

er (k

W) Ave. power (kW)

Accumulated power (kW*days)

0

500

1000

1500

2000

2500

3000

3500

05

1015202530354045

2015/4/1 2015/6/1 2015/8/1 2015/10/1 2015/12/1

Accu

mul

ated

pow

er

(kW

*day

s)

Ave.

pow

er (k

W)

Ave. power (kW)Accumulated power (kW*days)

Accumulated beam time and intensity for HD Before accident (Feb, 2009 – May, 2013): 1.26x106 spills※, 560 kW*days After accident (Apr, 2015 – Dec, 2015): 1.05x106 spills, 2338 kW*days

24 kW @resumption

※spill: # of beam shots to HD

Beam time used by experiments in 2015 16

この数字は割当時間なので、 実際に使った時間に直す

ホールの絵

E14 KL->π0νν Experiment 1509 hours E36 Measurement of Γ(K+->e+ν)/Γ(K+->μ+ν) 1504 hours

E15 search for deeply-bound kaonic nuclear states 708 hours

E05 Spectroscopic Study of Ξ-Hypernucleus 319 hours

E07 Systematic Study of Double Strangeness System with an Emulsion-Counter Hybrid Method

42 hours

E13 γ-ray spectroscopy of light hypernuclei 435 hours

K1.8

KL

K1.8BR

K1.1BR

Press-released from Tohoku U., KEK, JAEA, J-PARC

Production Target

50 kW target

• April, 2015 - • Indirect cooling • Currently working

80 kW target

• Fall, 2017 or 2018 - • Indirect cooling • Ready to manufacture

>100 kW target

• Around 2020/2021 - • Direct cooling • Under R&D

18

Current Production Target

Measured temperature was in good agreement with calculation

Temperature of each gold piece was measured with thermocouples every 100ms

6 1.

5

f0.5mm sheath thermocouples

Copper

Beam

1 2 3 4 5 6

050

100150200250300350

0 10 20 30 40 50

Max

. tem

p. ri

se (K

)

Beam power (kW)

datacalc

19

Gold (6-divided)

Proton beam

Cooling water

Stainless-steel pipes

66mm

Copper

Temperature @41.6kW

on spill (2sec) oｆｆ spill (3.52sec)

max 297℃（ΔT=267K）

beam-power dependence

Production Target

50 kW target

• April, 2015 - • Indirect cooling • Currently working

80 kW target

• Fall, 2017 or 2018 - • Indirect cooling • Ready to manufacture

>100 kW target

• Around 2020/2021 - • Direct cooling • Under R&D

20

Next Indirect Cooling Target • Gold target on Cu holder • Indirect water cooling as the current target • Relatively straightforward to develop. • ~80 kW proton beam can be accepted. • Will be installed as a replacement of the current target.

6

View from upstream

Design margin: 2.5

ANSYS 15.0 NODAL SOLUTIONSTEP=58 SUB =4 TIME=106.88 TEMP (AVG) RSYS=0PowerGraphicsEFACET=1AVRES=MatSMN =60.572 SMX =325.275

1

MN

MXX

Y

Z

60.572 77.116 93.6599 110.204 126.748 143.292 159.836 176.38 192.923 209.467 226.011 242.555 259.099 275.643 292.187 308.731 325.275

target160105-115p(Au ƒÐ2.5,1.0) @ 30GeV-9.19e13ppp @5.52s-cycle (cal+0.15,-0.15)

ANSYS 15.0 NODAL SOLUTIONSTEP=4 SUB =10 TIME=2 SEQV (AVG) RSYS=0DMX =.129E-03 SMN =216621 SMX =.616E+08

1

MN

MX

X

Y

Z

216621 .405E+07 .788E+07 .117E+08 .156E+08 .194E+08 .232E+08 .271E+08 .309E+08 .347E+08 .386E+08 .424E+08 .462E+08 .501E+08 .539E+08 .577E+08 .616E+08

sold-target160105-115p (91.9T,ƒÐ2.5,1.0) @ 30GeV-8.04e13ppp @5.52s-cycle +0.15,-

beam beam

max 325°C

vertical expansion: max 0.10mm

bonded interface 51MPa

bonded interface 229°C

von Mises stress temperature

Bonding strength: 128MPa(@229°C)

Result of Thermal Analysis (80kW, 5.52s cycle)

21

Ready to manufacture

50 kW target

• April, 2015 - • Indirect cooling • Currently working

80 kW target

• Fall, 2017 or 2018 - • Indirect cooling • Ready to manufacture

>100 kW target

• Around 2020/2021 - • Direct cooling • Under R&D

Production Target

22

Rotating “EURO Coin” Target

Beam

Au or Pt

Ni

Contents

• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary

23

New Primary Proton Beam Line 24

COMET

High-p Separation

n High-momentum Beam Line – Primary protons (~1010 – 1012pps)

• E16 (phi meson) is considered to be the first experiment.

– Unseparated secondary particles (pi, …) • High-resolution secondary beam by

adding several quadrupole and sextupole magnets.

n COMET – Search for m to e conversion – 8 GeV, 50 kW protons – Branch from the high-momentum BL – Annex building is being built at the

south side.

• New primary Proton Beam Line = High-momentum BL + COMET BL = has been funded and the construction started.

Thin production target!

Secondary beams

Unseparated Secondary Beam 26

1.0E+031.0E+041.0E+051.0E+061.0E+071.0E+081.0E+09

0 5 10 15 20

Cou

nts/

sec

[GeV/c]

1.0E+031.0E+041.0E+051.0E+061.0E+071.0E+081.0E+09

0 5 10 15 20

Cou

nts/

sec

[GeV/c]

Prod. Angle = 0 deg. (Neg.) Prod. Angle = 3.1 deg (Pos.)

p-

K-

pbar

p+

K+

* Sanford-Wang:15 kW Loss on Pt, Acceptance :1.5 msr%, 133.2 m

Noumi

“GPD” and “Transition GPD”

27

, Kp

,p n , , ,N D L S

*g

J-PARC E50 Spectrometer + MuID

28

p-

LH2-target

Ring Image Cherenkov Counter

Internal DC

FM magnet

ps-

K+

Fiber tracker

Beam GC

Internal TOF

Internal TOF DC

TOF wall

2m

Decay p(p+)

20 GeV/c Beam p-

Acceptance: ~ 60% for D*, ~80% for decay p+ Resolution: Dp/p~0.2% at ~5 GeV/c （Rigidity： ~2.1 Tm)

|q|<60_

Scintillator Muon trigger device

m+

m-

Contents

• J-PARC and Hadron Experimental Facility (Hadron Hall) • Physics overview and fruits so far obtained • High-momentum beam line • Extension • Summary

29

Hadron Hall Extension • Extend the Hadron Hall for ~105m. • Construct 2 production targets with beam lines.

30

Single strangeness experiments to explore generalized baryon-baryon interaction

Spectroscopy of multi-strangeness and charm systems

From discovery to measurement of K0 rare decay

Hadron Hall Extension • Hadron Hall extension has been proposed to the Science

Council of Japan for their recommendation as a next big project, and selected as one of the 27 important big projects.

• A review committee at MEXT selected the J-PARC future project including the Hadron Hall extension as one of the 11 major projects on its roadmap.

• The Institute of Particle and Nuclear Studies, KEK has made the discussion for future projects (ILC, neutrino, and Hadron extension) at the research program committee, and they have concluded that the Hadron extension should be promoted, as well as other projects.

31

• The beam operation at the Hadron Facility restarted from April, 2015. • The beam power at the restart was 24kW, and then improved gradually

to 42kW in December. • The high-momentum beam line is under construction, and will be

available in a few years. • The extension of the Hadron Hall has been proposed, and got a good

message from initial reviews.

32

Summary

April 28, 2015