Charmed-hadron Physics and Physics of Hadron-hall...

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Charmed-hadron Physics and Physics of Hadron-hall extension at J-PARC

Hiroyuki NoumiRCNP, Osaka Univ./IPNS, KEK

KEK Theory Center WS on Hadron and Nuclear Physics at J-PARC@KEK, Jan 7-10, 2017

Contents

• Overview of Hadron Hall and its Extension

– Particle Physics Program

• Beyond SM, Matter-Antimatter asymmetry

– Nuclear Physics Program

• High density Hadronic Matter, Nuclear Force

• Hadron Physics Program

– Hadron Spectroscopy, Hadron Property in Matter

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Presentation is based on discussion inInt. WS on Phys. at the Extended Had. Exp. Facil. of J-PARC:

https://kds.kek.jp/indico/event/20472/


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Dense Nucl. Matter

Hadron Nuclear Physics at J-PARC

Quark

Nucleus

Hadron

Atom→Molecule→Material,Human,Star,Universe

Mystery of Neutron Star

QCD

BB Int. （2BF, 3BF） Hyperon Matter

How QCD works in Hadron?

How are nuclei formed?

• Effective DoF (building blocks) to describe hadrons• Change of Hadron Properties in Matter

• Extended Nuclear Force：Baryon-Baryon Int.• Stability of Heavy Neutron Stars

Matter Evolution from Quark to Hadron, Nucleus, and Neutron Star

Effective DoF

Hypernuclei

QQ

Q

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experiments in Hadron Hall

Beam Dump

K1.8

K1.8BR

30 GeV primary beam

Productiontarget (T1)

KL

phi meson mass

in nuclei

K-pp bound states

K- atomic X rays

Λ（1405） hyperon

COMET: m-e conversion search

X hypernuclei

LL hypernuclei

X-atomic X-rays

L hypernuclear g rays

Neutron-rich L hypern.

Pentaquark Q+ search

K-pp bound state

…

K0L rare decays

K-

pp X p

n

56 m

Overview: Extension of the Hadron Experimental Facility

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• < 1.2 GeV/c• ~106 K-/spill

• 5 deg extraction• ~5.2 GeV/c K0

• Good n/K

• < 2.0 GeV/c• 1.8x108 pion/spill• x10 better Dp/p

105 m

• <10 GeV/c separated pion, kaon, pbar

• ~107/spill K-, pbars

• < 2.0 GeV/c• ~106 K-/spill

• < 1.1 GeV/c• ~105 K-/spill

• 30 GeV proton• <20 GeV/c unseparated 2ndary

beams (mostly pions), ~107/spill

A write paper for Hadron-hall Extension is coming soon.

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Particle Physics (KOTO 2)

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• Good n/K

𝐾𝐿 → 𝜋0𝜈 ҧ𝜈 , sensing physics beyond the SM


• Good n/K

SM predictionBr: 3x10-11

10% of the SM predictionBr: 3x10-12

“ loop ”

Nuclear Physics Program

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• < 1.2 GeV/c• ~106 K-/spill

• < 2.0 GeV/c• 1.8x108 pion/spill• x10 better Dp/p

105 m

• < 2.0 GeV/c• ~106 K-/spill

• < 1.1 GeV/c• ~105 K-/spill

Properties of high density hadronic matterwith strangeness

• 2 body BB interaction• 3 body BB interaction

Issue in Nuclear Physics

• To understand hadronic matter, in particular, at high density…

Though the nuclear density is hardly controlled with keeping low temperature in experiment…

• Heavy neutron stars may provide a touchstone.

• Need to refine knowledge on nuclear forces:– More reliable BB interaction

– Effects of multi-body forces

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𝐸

𝐴𝜌 = 2𝐵𝐹 𝜌 + 3𝐵𝐹 𝜌 + 4𝐵𝐹 𝜌 +⋯

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High Density Hadronic Matter

Hypernuclear Physics tells:The NS core is likely to

contains ｈyperons.

Mass – Radius relation of NSCalculated by Known BB interaction

Neutron Star

makes the EoS soften.Max. MNS~1.5 Msolar

n

p

L

X

d u

s

s

sHyperons

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Neutron star puzzle!



PSR J1614-2230Nature 467, 1081(2010)

Observation:Max. MNS ~ 2Msolar

PSR J0348+0432Science 380, 1233232(2013)


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Neutron star puzzle!



PSR J1614-2230Nature 467, 1081(2010)

Observation:Max. MNS ~ 2Msolar

PSR J0348+0432Science 380, 1233232(2013)

Universally-working, repulsive forces (URF)among 3/4 baryons ?

+ Multi-bodyRepulsiveForces


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High Density Hadronic Matterthrough high precision (π,K+) spectroscopy

• ΛNN 3-body force; attractive in long range, repulsive in short range ?

sL

pL

dL

fL

BL

[Me

V]

30

20

10

0w/ 3B Repulsion

w/o 3B Repulsion

50 100 150 200

Mass Number

0.1 M

eV

w/o 3B Repulsion

PresentResolution

Differences to “w/o 3B repulsion”

50 100 150 200

Mass Number

2

-2

-1

0

1

DB

(sL

) ex

p-t

he

ory

[Me

V] sL

Binding Energy (B(sΛ)) difference with/without 3 body repulsion ~±0.5 MeV

Mass dependence (=density dependence) of B(sΛ) reveals strength of the 3-body repulsion force. ∆E~0.1 MeV measurement is required to verify 3-body repulsion and to solve the Hyperon Puzzle.

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High Density Hadronic Matterthrough high precision (π,K+) spectroscopy

• ∆E~0.1 MeV measurement with (π,K+) at High-Intensity High-Resolution BL

KEK-PS E369 with SKS Expected at HIHR beam line

Neutron Star Radius (km)

NS

Mas

s (S

ola

r M

ass

Un

it)

2𝑀⨀

w/ YNN 3BRF

HIHR

Issue in Nuclear Physics

• To understand hadronic matter, in particular, at high density…

Though the nuclear density is hardly controlled with keeping low temperature in experiment…

• Heavy neutron stars may provide a touchstone.

• Need to refine knowledge on nuclear forces:– More reliable BB interaction

– Effects of multi-body forces

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𝐸

𝐴𝜌 = 2𝐵𝐹 𝜌 + 3𝐵𝐹 𝜌 + 4𝐵𝐹 𝜌 +⋯

YN Data is still very poor.

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npnp pppp LpLp Lp0p

p+p pp p0n pLn

• Insufficient ds/dW : Short range part (high-p)

• Lack of P*ds/dW : Lp, +p Spin-Orbit Int.

• Yd : 3B int.

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K. Miwa et al.(Tohoku U.)

at K1.1

Many Important Subjects are lined up• Hypernuclear Weak Decay (Botta et al., Feliciello et al.)

– Short lifetime problem : t(3LH, 4LH)<t(L)

• Hypernuclear Magnetic Moment (H. Tamura et al.)– Change of Hyperon Property in Matter

• hypernuclei– Coulomb Assisted Hybrid Bound State

• XN, WN, AXZ, AWZ : K1.8/K10 (H. Takahashi et al.)• h-, h’-meson in nucleus

– A(p,p)h(h’)D (K. Itahashi, H. Fujioka et al.)– restoration of ChSB

• Exotic atom/nuclei– Kaonic X-ray w/ Ultra-high Res. (S. Okada et al.)

• K-A int., Fundamental Physics

– 4He(p,p)4n (H. Fujioka et al.)

• T-violation in Transverse 𝜇+ polarization in 𝐾+ → 𝜋0𝜇+𝜈 (TREK E06)• Recent Reference:

– Int. WS on Phys. at the Extended Had. Exp. Facil. of J-PARC: https://kds.kek.jp/indico/event/20472/ 18


Hadron Physics Programs

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• <10 GeV/c separated pion, kaon, pbar

• ~107/spill K-, pbars

• 30 GeV proton• <20 GeV/c unseparated 2ndary

beams (mostly pions), ~107/spill

• Structure of Hadrons w/ charm/multi-strange quarks• Hadron Properties in Nuclear Medium

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Hadron Physics at J-PARC

𝛼𝑠 = ∞at LQCD

High E Low E

How are they excited?

How do they change properties in medium?

Quasi-Particles (= Effective DoF) emerging at Low E describe hadron properties effectively.

Baryon Spectroscopy w/ Heavy Quark

• Disentangle Quark Correlations in Baryon– λ and ρ motions split (Isotope Shift)

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λ mode

ρ mode

G.S.

P-wave

Q

l

[qq]

Q

r(qq)

mQ = mq mQ > mq

q

q

qറ𝑠𝐻𝑄 ± റ𝑗𝐵𝑀

......

Spin-dep. Int.

ℏ𝜔𝜌

ℏ𝜔𝜆=

3𝑚𝑄

2𝑚𝑞 +𝑚𝑄→ 3 (𝑚𝑄 → ∞)

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Lambda Baryons (P-wave)

c(1/2+)

c*(3/2+)

Lc(2595, 1/2)Lc(2625, 3/2)

Lc oｒ c (2765, ??)

Lc(2880, 5/2)

Lc(2940, ??)

Lc(GS)

L(1520, 3/2)

(1/2+)

L(1/2+)

*(3/2+) L(1405, 1/2)

L(1830, 5/2)

L(1690, ??)L(1670, 1/2)

L(GS)

b(1/2+) b

*(3/2+)

Lb(5920, 3/2)Lb(5912, 1/2)

Lb(GS)

strange charm bottom

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0

100

200

300

400

500

600

700

800

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

Y* -

YG.S

.[M

eV]

MQ [GeV/c2]


s c

non-rel. QM:H=H0 +Vconf +VSS+VLS+VT

rl mixing (cal. By T. Yoshida)

c(1/2+)

c*(3/2+)

Lc(2595, 1/2)Lc(2625, 3/2)

Lc oｒ c (2765, ??)

Lc(2880, 5/2)

Lc(2940, ??)

Lc(GS)

L(1520, 3/2)

(1/2+)

L(1/2+)

*(3/2+) L(1405, 1/2)

L(1830, 5/2)

L(1690, ??)L(1670, 1/2)

L(GS)

l

r

b

r

b(1/2+) b

*(3/2+)

Lb(5920, 3/2)Lb(5912, 1/2)

Lb(GS)

Q

qq

l

r

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High-res., High-momentum Beam Line

30 GeV

proton beam

Production

Target

Pion BeamUp to 20 GeV/c

Spectrometer

T1

• High-intensity secondary Pion beam (unseparated)– 1.0 x 107 pions/sec @ 20GeV/c

• High-resolution beam: Dp/p~0.1%• High-res. Spectrometer: Dp/p~0.2% at ~5 GeV/c

K+

p

ps

decayp(p)

RICH

ITOF

FiberTracker

DCDC

DCTOF

H2 TGT

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Charmed Baryon SpectroscopyUsing Missing Mass Techniques

Production and Decay reflect [qq] correlation in Excited Yc* C.S. DOES NOT go down at higher L when qeff >1 GeV/c.

p

p

D*-

Yc*+

L

D*, Dqeff

D0

pp

K+

𝐷0 (𝑌𝑐∗′)

p (p)

S.H. Kim, A. Hosaka, H.C. Kim, and HN, PTEP, (2014) 103D01, S.H. Kim, A. Hosaka, H.C. Kim, and HN, Phys.Rev. D92 (2015) 094021

)2(exp)(~ 22 A/-q/AqI eff

L

effL

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L = 1 L = 2L = 0

1/2+

LcLc(2595)

c(2800)

c

c*

Lc(2625)

Lc(2880)

Lc(2940)

s ~1 nb

Missing Mass Spectrum (Sim.)• ~1000 Yc

*/nb/100 days• Sensitivity: s ~0.1 nb for

Yc* w/ G =100 MeV

1/2- 3/2- 5/2+? 3/2+?

LS partner

(HQS doublet)

LS partner?

(HQS doublet?)

1 : 2

3 : 2

l mode ll mode?

0

100

200

300

400

500

600

700

800

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

Y* -

YG.S

.[M

eV]

MQ [GeV/c2]


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s c

non-rel. QM:H=H0 +Vconf +VSS+VLS+VT

rl mixing (cal. By T. Yoshida)

c(1/2+)

c*(3/2+)

Lc(2595, 1/2)Lc(2625, 3/2)

Lc oｒ c (2765, ??)

Lc(2880, 5/2)

Lc(2940, ??)

Lc(GS)

L(1520, 3/2)

(1/2+)

L(1/2+)

*(3/2+) L(1405, 1/2)

L(1830, 5/2)

L(1690, ??)L(1670, 1/2)

L(GS)

l

r

b

r

b(1/2+) b

*(3/2+)

Lb(5920, 3/2)Lb(5912, 1/2)

Lb(GS)

Q

qq

l

r

Lc(2880)

Lc(2940)

c*(2520)

c(2455)

Lc(2880)Belle, PRL98, 262001(’07)

Lc(2880)->pc(2455)

Lc(2765)?

J=5/2 → J’=1/2

Lp=3transition

JP=5/2+ for Lc(2880)

Lp=1 contribution may affect…

G(Lc(2880)->pc(2455))

G(Lc(2880)->pc*(2520))

Is it a D-wave Lambda-c Baryon?If so, where is a spin partner ?

=0.23

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Does L(2880) have L=2?• P-wave transition seems to be suppressed in

Λ𝑐 28805

2+ → Σ𝑐

∗ 25203

2+ + 𝜋(0−).

• It would be forbidden only in the case of 𝐽𝐵𝑀𝑃 = 3+:

– Negative party states “5/2-” have large widths.

(H. Nagahiro et al., arXiv 1609.01085, PRD accepted)

• Λ𝑐 28805

2+ is likely to be lr mode (l=1, r=1).

• This can be tested by measuring its production rate.

Lc(2880) 5/2+ ll lr rr

color Asymm.

Isospin Asymm. (I=0)

Diquark spinDiquark orbit

Asymm. 0Symm. 0

Symm. 1Asymm. 1

Asymm. 0Symm, 2

Lambda orbit 2 1 0

JBMP 2+ 1+, 2+, 3+ 2+

c*(2520) 3/2+

Asymm

Symm. (I=1)

Symm. 1Symm, 0

0

1+

Q

qq

l

r

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N

DYc*’

p

l moder mode

Yc* Decay Pattern

Yc* Yc

*

G(DN) >G (Yp)G (Yp) >G(DN)

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Disentangle Quark Correlations in Baryon w/ HQ

r mode

Level crossing between QQq and Qqq

Different decay branches for different correlations

r/l mode separation in excited states reveals quark correlations.

Decay branches reflect the quark correlations.

𝑄ത𝑞

𝑄𝑞𝑞

qQQ

qq

l mode

𝑞ത𝑞

𝑄𝑄𝑞

QQQ

𝑚𝑄 = 𝑚𝑄 > 𝑚𝑞 𝑚𝑄 > 𝑚𝑞 = 𝑚𝑞3𝑚𝑄

𝛺𝑠𝑠𝑠∗

𝛯∗ → 𝛯𝜋

𝛯∗ → 𝛬𝐾, 𝛴𝐾

𝛯𝑠𝑠∗

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Facility: K10X*, W*, D productions

3-stage electro-static separators:

9 m each, 75kV/cm

Length : 82.8 m

K-

4GeV/cpbar4GeV/c

pbar6GeV/c

Acceptance (msr-%) 0.33 1.2 0.55

Beam Intensity (/spill) 1.7x106 1.6x107 7.8x106

Purity 1.1:1 81:1 1:3.4

25 kW loss@T2 target

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Spontaneous Chiral Symmetry Breaking

• Qualitative impression how ത𝑞𝑞 behaves with r and T.

W. Weise, NPA553, 59(1996)

Nucleus

CSC𝑞𝑞

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• Spectral changes of vector mesons in nuclear matter

T. Hatsuda, H. Shiomi, and H. Kuwabara, PTP95, 1009(1996)

Spontaneous Chiral Symmetry Breaking

35PRL98(07)042501

Vector meson in Nuclear MediumE16 Experiment at the High-p Beam Line

• Branch from the main primary BL-A line1010 primary proton at 30 GeV

• Commissioning will start in FY2018

e-

e-

e+

e+ e+

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Property changes of Hadrons in Matter:

• Vector meson (ത𝑞𝑞): f, w, r

– Mass: decreasing in matter

ത𝑞𝑞 in vacuum

ത𝑞𝑞in matter

ത𝑄𝑞 in vacuum

ത𝑄𝑞 in matterLight quarkmass [GeV]

mes

on

mas

s sh

ift

[GeV

]

E16

mass(e+e-) [GeV]

simulation

• Open charm meson ( ത𝑄𝑞): D

– Mass: increasing in matter ?

D Mesons in Nuclear Medium

37H. Ohnishi (RIKEN/RCNP)@HEF-Ext WS, Mar, 2016

How to observe the effect?

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Sub-threshold enhancement of D+/D- productionon pbar-A interaction (Euro.Phys.J A,351)

H. Ohnishi (RIKEN/RCNP)@HEF-Ext WS, Mar, 2016

T(GeV)

Fermi motion

MediumModification?

Can We Stick D-/Lc+ in Nucleus?

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0

0.5

1

1.5

2

2.5

3

3.5

4 5 6 7 8 9 10 11 12 13 14 15

Mo

men

tum

Tra

nsf

er [

GeV

/c]

pbar momentum [GeV/c]

ҧ𝑝𝑝 → 𝐷−𝐷+• ҧ𝑝𝑝 → 𝐷−𝐷+

Recoil momentum is too far beyond the Fermi-momentum…

Can We Stick D-/Lc+ in Nucleus?

• ҧ𝑝𝑑 → 𝐷−Λ𝑐+

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Λ𝑐+

ഥ𝐷

𝑝

ҧ𝑝

𝑛

𝐷

• ҧ𝑝𝐴 → 𝐷− + Λ𝑐𝐴′

→ Λ𝑐+ + ഥ𝐷𝐴′′

0

0.5

1

1.5

2

2.5

3

3.5

4 5 6 7 8 9 10 11 12 13 14 15

Mo

men

tum

Tra

nsf

er [

GeV

/c]

pbar momentum [GeV/c]

ҧ𝑝𝑑 → 𝐷−Λ𝑐+

ҧ𝑝𝑑 → Λ𝑐+𝐷−

ҧ𝑝𝑝 → 𝐷−𝐷+

Problem: How small is the C.S. ?

Summary

• The project is listed up in a “Roadmap 2014”, a basic plan for large-scale academic projects to be promoted under MEXT

• KEK recently implanted a priority to this project.

• Physics opportunities should be expanded in the Hadron Hall at J-PARC.

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Charmed-hadron Physics and Physics of Hadron-hall...

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