understanding masses of charm-strange states in regge phenomenology
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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 PresentationTRANSCRIPT
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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 ,
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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
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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
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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)
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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
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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
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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
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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
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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