understanding masses of charm-strange states in regge phenomenology

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De-Min Li Department of Physics, Zhengzhou University [email protected] Oct. 29, 2006 高高高高高高高高高高高高高高高高高高高高高高 高高高高高高高高高高高高高高高高高高高高高高 2006.10.28-11.1 2006.10.28-11.1 高高 高高 Understanding masses of charm-st Understanding masses of charm-st range states in Regge phenomenol range states in Regge phenomenol ogy ogy

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高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 桂林. Understanding masses of charm-strange states in Regge phenomenology. De-Min Li Department of Physics, Zhengzhou University [email protected] Oct. 29, 2006. 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 桂林. Outline. Introduction. - PowerPoint PPT Presentation

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Page 1: Understanding masses of charm-strange states in Regge phenomenology

De-Min LiDepartment of Physics, Zhengzhou University

[email protected]. 29, 2006

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Understanding masses of charm-strange sUnderstanding masses of charm-strange states in Regge phenomenologytates in Regge phenomenology

Page 2: Understanding masses of charm-strange states in Regge phenomenology

Outline Introduction

Regge Phenomenology

D and Ds Spectra

Discussion

Summary

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 3: Understanding masses of charm-strange states in Regge phenomenology

Important to exhaust possible conventional description before restoring to exotic models

hep-ph/0605019, hep-ph/0608011, hep-ph/0608139

Introduction

Masses of these charm strange states can be reproduced well in Regge phenomenology

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Experimental information

Ds0(2317), D0(2290)/D0(2308), DsJ(2632), DsJ(2860), DsJ(2690)/DsJ(2715) Theoretical predictions

Quark model : Ds0 mass, 2.48, 2.487GeV

Page 4: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenologyQuasi-linear Regge trajectory Detailed : De-Min Li et al. , Eur. Phys. J. C 37, 323 (2004)

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 5: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenology

Slope of Regge trajectory

JP of DsJ(2860) : 0+ , 1- , 2+ , 3-

JP of DsJ(2690)/DsJ(2715): 1-

Assumption 1 argued by Phys. Rev. D61 , 054013 ( 2000 )

Slopes of parity partners’ trajectories coincide0+ , 1- , 2+ , 3- are the 13S1-like trajectories

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 6: Understanding masses of charm-strange states in Regge phenomenology

Assumption 2 argued by Phys. Rev. D62 , 051502 ( 2000 )

Regge phenomenology

Slopes used in this work (parameters-1)Taken from De-Min Li , Eur. Phys. J. C 37, 323 (2004)

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 7: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenology

P. C. Collins, An introduction to Regge theory and high energy physics, 1977

is flavor-independent

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 8: Understanding masses of charm-strange states in Regge phenomenology

Anisovich, Phys. Rev. D 62, 051502 (2000 )

cc\bar n=1 n=2 n=3 n=4

The. MeV 3097 3447 3764 4058

Exp. MeV 3097 3686 4039 4421

Regge phenomenology

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 9: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenology

is flavor-dependent

Phenomenological analysis indicates Filipponi , Phys. Rev. D58,016003(1998), Phys. Rev. Lett.80,1838 (1998)

( 1 ) Depends on mi, mj

( 2 ) Through the combination (mi+mj)

(3) ~1.3-1.6 ( for n=2 )

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 10: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenologyWe propose

Masses of constituent quarks (in GeV)

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

which are typical values used in phenomenology quark models

Page 11: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenologyInput

Additivity of intercepts

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 12: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenology

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

parameters-2( GeV-1)

It is found that

Agree well with the quantitative result~ 1.3—1.6

Page 13: Understanding masses of charm-strange states in Regge phenomenology

Comparison with exp. and other theoretical results

Regge phenomenology

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 14: Understanding masses of charm-strange states in Regge phenomenology

Regge phenomenology

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 15: Understanding masses of charm-strange states in Regge phenomenology

D and Ds spectraChoice of the scalar I=1, I=1/2 light mesonsRecent Lattice QCD stimulations

Lightest I=1, a0:

1.04(7) GeV, RBC, Nucl. Phys. (Proc. Suppl.)

119,822 (2003)

1.0(2) GeV, UKQCD , Nucl. Phys. (Proc. Suppl.)

119,266 (2003)

1.01(4) GeV UKQCD, Phys. Rev. D74,014508 (2006)

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

1.4 ~ 1.6 GeV, RD70,094503(2004),PRD73,094505(2006)

hep-lat/0607110 ,

Page 16: Understanding masses of charm-strange states in Regge phenomenology

D and Ds spectra

Here we take

Mass of I=1, a0

(1.04+1.0+1.01)/3=1.02 GeV

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

1318MeVConsidering thatThe spin-orbit force makes lighter a0 respect to a2 , the same behavior is evident in charmonium and bottomonium

Naïve Quark model prediction

Page 17: Understanding masses of charm-strange states in Regge phenomenology

D and Ds spectraLattice studies suggest [ PRD.74,014508(2006) ]

Mass of I=1/2, K0 would be 100-130 heavier than a0 mass, which is not easily related to any current experimental candidate,

while is consistent with the result from K matrix analysis ( Phys. Lett. B413,317 (1997) )

I=1/2, K0, mass: 1090(40) MeV

Here we take mass of I=1/2, K0

1.09 GeV

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 18: Understanding masses of charm-strange states in Regge phenomenology

D and Ds spectra

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Hep-ph/0610327

2.31(3)

Page 19: Understanding masses of charm-strange states in Regge phenomenology

DiscussionDsJ(2860)

Mass: 2856.6(1.5)(5.0) MeV

Width:48(7)(10) MeV

Observed only in D0K+, D+Ks0

Possible JP: 0+,1-,2+,3-,…

DsJ(2856)

3P0 model (hep-ph/0609031)

1-(13D1) width: 132>>48

0+(23P0) width: 54 ~ 48

3-(13D3) width: 37 ~ 48

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Page 20: Understanding masses of charm-strange states in Regge phenomenology

DiscussionDsJ(2632)

Only observed by SELEX,

Searches by FOCUS, BaBar, CLEO have on evidence

May be an experimental artifact

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Mass:2632(1.7)

=2.2(2) >> 0.14(0.06) (PLB623,218 (2005))

B-S Eq. 23S1 cs\bar : 2658(15)MeV

Page 21: Understanding masses of charm-strange states in Regge phenomenology

Discussion

DsJ(2690)/DsJ(2715)

DsJ(2690), BaBar, hep-ex/0607082

Mass 2688(4)(2), Width: 112(7)(36)

DsJ(2715), Belle, JP=1-, hep-ex/0608031

Mass 2715(11)(14), Width: 115(7)(36)

3P0 model

(Close, hep-ph/0608139)

1-(23S1(2688)) width: 103 ~115

3P0 model (Zhu,hep-ph/0609013)

1-(13D1(2715)) width: 73 ~ 115

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

~100MeV lighter than predictions

Page 22: Understanding masses of charm-strange states in Regge phenomenology

Summary Predictions by Regge phenomenology agree remarkably well with the experiments for charmonium spectrum

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林

Masses predicted by Regge phenomenology are in good agreement with those by some modified quark model for the charmed mesons It is not necessary to introduce more exotic models for understanding the masses of the recent observed charmed states

Page 23: Understanding masses of charm-strange states in Regge phenomenology

Thanks

高能物理学会第七届全国会员代表大会暨学术年会 高能物理学会第七届全国会员代表大会暨学术年会 2006.10.28-11.1 2006.10.28-11.1 桂林桂林