Recent results for properties of D** and excited Ds mesons

For commentary, see the most recent HFAG report (arXiv:0808.1297) and the draft of the D(s)** mesons section update

Recent results for properties of D** mesons

Main Results Reference Comments
Masses
[MeV/c2],
widths
[MeV] 		M(D0* (2400)0) : 2352 ± 50
Γ(D0* (2400)0) : 261 ± 50
M(D2* (2460)0) : 2461.1 ± 1.6
Γ(D2* (2460)0) : 43 ± 4
M(D2* (2460)±) : 2460.1 ± 2.63.5
Γ(D2* (2460)±) : 37 ± 6
M(D1(2420)0) : 2422.3 ± 1.3
Γ(D1(2420)0) : 20.4 ± 1.7
M(D1(2420)±) : 2423.4 ± 3.1
Γ(D1(2420)±) : 25 ± 6 		PDG (2009) PDG average

To M(D0* (2400)0) and
Γ(D0* (2400)0) from FOCUS
also D1(2430)0 may contribute
M(D1(2430)0) : 2427 ± 26 ± 20 ± 15
Γ(D1(2430)0) : 384 ± 10775 ± 24 ± 70 		Belle last error due
to Dalitz model
M(D0* (2400)±/D1(2430)±) : 2403 ± 14 ± 35
Γ(D0* (2400)±/D1(2430)±) : 283 ± 24 ± 34 		FOCUS D0* (2400)0/D1(2430)0 and
D0* (2400)±/D1(2430)± may
contribute to signal
M(D2* (2460)0) : 2463.3 ± 0.6 ± 0.8
M(D1(2420)0) : 2421.7 ± 0.7 ± 0.6 		CDF M measured relative
to M(D(*) ±)
M(D2* (2460)0) : 2460.6 ± 1.2 ± 1.2 ± 1.9
Γ(D2* (2460)0) : 41.8 ± 2.5 ± 2.1 ± 2.0
M(D0* (2400)0) : 2297 ± 8 ± 5 ± 19
Γ(D0* (2400)0) : 273 ± 12 ± 17 ± 45
BaBar last error due
to Blatt-Weisskopf
factors and
signal/background
composition
Γ(D1(2420)0) : 53.2 ± 7.2 ± 3.34.9
Zeus width significantly larger
than the world average
Branching
fractions
[10−4] 		B−→D0* (2400)0π−,
D0* (2400)0→D+π− : 6.1 ± 0.6 ± 0.9 ± 1.6
B−→D2* (2460)0π−,
D2* (2460)0→D+π− : 3.4 ± 0.3 ± 0.6 ± 0.4
B−→D1(2420)0π−,
D1(2420)0→D* +π− : 6.8 ± 0.7 ± 1.3 ± 0.3
B−→D2* (2460)0π−,
D2* (2460)0→D* +π− : 1.8 ± 0.3 ± 0.3 ± 0.2
B−→D1(2430)0π−,
D1(2430)0→D* +π− : 5.0 ± 0.4 ± 1.0 ± 0.4 		Belle last error due
to Dalitz model
B0→D2* (2460)+π−,
D2* (2460)+→D0π+ : 2.15 ± 0.17 ± 0.29 ± 0.12
B0→D0* (2400)+π−,
D0* (2400)+→D0π+ : 0.60 ± 0.13 ± 0.15 ± 0.22 		Belle last error due
to Dalitz model;
M(D0* (2400)±) = M(D0* (2400)0),
Γ(D0* (2400)±) = Γ(D0* (2400)0)
assumed
B−→D1(2420)0π−,
D1(2420)0→D0π+π− : 1.85 ± 0.29 ± 0.35 ± 0.000.43
B0→D1(2420)+π−,
D1(2420)+→D+π+π− : 0.89 ± 0.15 ± 0.17 ± 0.000.27 		Belle last error due to
possible D2* (2460)0,
D2* (2460)± contr.
B−→D2*(2460)0π−,
D2*(2460)0→D+π&minus : 3.5 ± 0.2 ± 0.2 ± 0.4
B−→D0*(2400)0π−,
D0*(2400)0→D+π&minus : 6.8 ± 0.3 ± 0.4 ± 2.0
BaBar last error due
to Blatt-Weisskopf
factors and
signal/background
composition
Quantum
numbers
(JP) 		D0* (2400)0 : 0+ Belle 0+ preferred over 1−, 2+
with sign. > 10σ
D1(2430)0 : 1+ 1+ preferred over 0−, 1−, 2+
with sign. > 10σ
D0* (2400)± : 0+ Belle 0+ preferred over 1−, 2+
with sign. ∼ 5σ

Graphical presentation of masses, widths and some branching fractions of orbitally excited D mesons

(click on plot for a high resolution image)

Shaded regions show the widths of individual states. The central point with error bars denotes the measured mass of each
state. Error bars at the edges of the shaded regions denote the uncertainties of the width determination. Divided arrows denote
relative branching ratios for the final states marked.

Recent results for properties of excited Ds mesons

Main Results Reference Comments
Masses
[MeV/c2],
widths
[MeV] 		M(Ds0* (2317)±) : 2318.0 ± 1.0
M(Ds1(2460)±) : 2459.6 ± 0.9
M(Ds1(2536)±) : 2535.12 ± 0.25
M(Ds2(2573)±) : 2572.6 ± 0.9
Γ(Ds2(2573)±) : 20 ± 5
PDG (2009) PDG average
M(Ds0* (2317)±) : 2317.2 ± 0.5 ± 0.9
M(Ds1(2460)±) : 2459.9 ± 0.9 ± 1.6
Γ(Ds0* (2317)±) : < 4.6
Γ(Ds1(2460)±) : < 5.5 		Belle M measuread relative
to M(Ds(*))
Γ(Ds0* (2317)±) : < 3.8
Γ(Ds1(2460)±) : < 3.5 		BaBar 95% C.L. U.L.
Γ(Ds1(2536)±) : < 2.3
Cleo  
M(Ds1(2700)±) : 2710 ± 2 ±127
Γ(Ds1(2700)±) : 149 ± 7 ±3952
M(DsJ(2860)±) : 2862 ± 2 ±52
Γ(DsJ(2860)±) : 48 ± 3 ±6
M(DsJ(3040)±) : 3044 ± 8 ±305
Γ(DsJ(3040)±) : 239 ± 35 ±4642
BaBar DsJ(3040)± signif.
6σ
M(Ds1(2700)± : 2708 ± 9 ± 1110
Γ(Ds1(2700)± : 108 ± 23 ± 3631 		Belle  
M(DsJ(2632)± : 2632.5 ± 1.7
Γ(DsJ(2632)± : < 17 		SELEX not seen by other exp's
sys. err. not given
Branching
fractions
[10−4]
unless otherwise
noted 		Ds1(2460)+→Ds*+π0 : 48 ± 11 %
Ds1(2460)+→Ds+γ : 18 ± 4 %
Ds1(2460)+→Ds+π+π- : 4.3 ± 1.3 %
Ds1(2460)+→Ds0*(2317)+γ : 3.7+5.0-2.4 %
 PDG (2009) PDG average
B0→D−Ds0* (2317)+, Ds0* (2317)+→ Ds+π0 : 8.6 ± 3.32.6 ± 2.6
B0→D−Ds1(2460)+, Ds1(2460)+→ Ds* +π0 : 22.7 ± 7.36.2 ± 6.8
B0→D−Ds1(2460)+, Ds1(2460)+→ Ds+γ : 8.2 ± 2.21.9 ± 2.5 		Belle further br. frac. for
B0, B± in paper
B0→D−Ds0* (2317)+, Ds0* (2317)+→ Ds+π0 : 18 ± 4 ± 3 ± 64
B0→D−Ds1(2460)+, Ds1(2460)+→ Ds* +π0 : 28 ± 8 ± 5 ± 106
B0→D−Ds1(2460)+, Ds1(2460)+→ Ds+γ : 8 ± 2 ± 1 ± 32 		BaBar further br. frac. for
B0, B± in paper;
last error
from B(D, Ds+)
B(Ds1(2460)±→Ds+γ)
B(Ds1(2460)±→Ds* ±π0) 		= 0.55 ± 0.13 ± 0.08
B(Ds1(2460)±→Ds+π+π−)
B(Ds1(2460)±→Ds* ±π0) 		= 0.14 ± 0.04 ± 0.02
σ(Ds1(2536)±)B(Ds1(2536)±→Ds+π+π−)
σ(Ds1(2460)±)B(Ds1(2460)±→Ds+π+π−) 		= 1.05 ± 0.32 ± 0.06
Belle  
B→Ds0* (2317)±K∓, Ds0* (2317)±→Ds+π0 :
0.53 ± 0.150.13 ± 0.07 ± 0.14
B→Ds1(2460)±K∓, Ds1(2460)±→Ds±γ : < 0.094 		Belle last error due
to B(Ds+)
σ(Ds0* (2317)±)B(Ds0* (2317)±→Ds+π0)
σ(Ds+) 		= (7.9 ± 1.2 ± 0.4) · 10−2
σ(Ds1(2460)±)B(Ds1(2460)±→Ds* ±π0)
σ(Ds+) 		= (3.5 ± 0.9 ± 0.2) · 10−2
CLEO  
B(Ds1(2536)±→D±π∓K±)
B(Ds1(2536)±→D* ±K0) 		= (3.27 ± 0.18 ± 0.37)%
Belle
B→Ds1(2536)±D∓ : 1.71 ± 0.48 ± 0.32
B→Ds1(2536)±D* ∓ : 3.32 ± 0.88 ± 0.66
B+→Ds1(2536)+D0 : 2.16 ± 0.52 ± 0.45
B+→Ds1(2536)+D* 0 : 5.46 ± 1.17 ± 1.04 		BaBar Ds1(2536)+→D* 0K+ used;
br. frac. with
Ds1(2536)+→D* +K0
in paper
B(Ds1(2536)+→D* 0K+)
B(Ds1(2536)+→D* +K0) 		= 1.32 ± 0.47 ± 0.23
ALEPH  
B+→Ds1(2700)+D0, Ds1(2700)+→D0K+ : 11.3 ± 2.2 ± 1.42.8 Belle
B(Ds1(2460)±→Ds+γ)
B(Ds1(2460)±→Ds+π0γ) 		= 0.337 ± 0.036 ± 0.038
B(Ds1(2460)±→Ds+π+π−)
B(Ds1(2460)±→Ds+π0γ) 		= 0.077 ± 0.013 ± 0.008
BaBar 95% C.L. U.L.
B(Ds1(2460)±→Ds* ±π0) = (56 ± 13 ± 9)%
B(Ds1(2460)±→Ds+γ) = (16 ± 4 ± 3)% 		BaBar  
B(DsJ(2632)+→D0K+)
B(DsJ(2632)+→Ds+η) 		= 0.14 ± 0.06
SELEX not seen by other exp's;
sys. err. not given
B(Ds1(2700)+→D* 0K+)
B(Ds1(2700)+→D0K+) 		= 0.91 ± 0.13 ± 0.12
B(DsJ(2860)+→D* 0K+)
B(DsJ(2860)+→D0K+) 		= 1.10 ± 0.15 ± 0.19
BaBar  
Quantum
numbers
(JP)
r Exp(iφ) ≡ 
 AL=2(Ds1(2536)±→D* ±KS)
AL=0(Ds1(2536)±→D* ±KS) 		=

= (0.63 ± 0.07 ± 0.02)Exp[±i(0.76 ± 0.03 ± 0.01)] 		Belle D-/S-wave amp. ratio
[2√2 r cosφ+1]/(1+r2) = 1.65±0.210.28
Zeus value calculated from fit
to helicity angle distrib.;
constraint in (r, cosφ) plane
in agreement with the above
measurement from Belle
Ds0* (2317)± : 0+, 1−, 2+, ... BaBar natural JP based
on JP conserv.
Ds1(2536)± : 1+, 1− BaBar 1− preferred over 2+
with sign. ∼ 4σ;
1+ preferred over 2−
with sign. ∼ 3σ;
DsJ(2700)± : 1− Belle 1− preferred over 0+, 2+
with sign. > 10σ
DsJ(2700)±, DsJ(2860)± : 1−, 2+, ... BaBar natural JP preferred
based on helicity
angle distr.;
0+ ruled out
due to DsJ→D*K
Ds1(2460)± : 1+ Belle 1+ preferred over 2−
with sign. ∼ 6σ
Ds1(2460)± : J ≠ 0 BaBar 0− disfavored
with sign. ∼ 5σ;
assuming decay
Ds1(2460)±→Ds* ±π0
→Ds+γπ0

Graphical presentation of masses, widths and some branching fractions of orbitally excited Ds mesons

(click on plot for a high resolution image)

Shaded regions show the widths of individual states (U.L. on the widths in case of Ds0*(2317)±, Ds1(2460)± and Ds1(2536)±).
The central point with error bars denotes the measured mass of each state. Error bars at the edges of the shaded regions denote the
uncertainties of the width determination. Arrows (divided arrows) denote branching fractions (relative branching ratios) for the final states marked.

This page is maintained by B. Golob and was last updated