Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)

I (J P ) = 1( 23 + ) Status:Σc (2520)∗∗∗±Seen in the Λ+c π mass spectrum. The natural assignment is that
this is the J P = 3/2+ excitation of the Σ (2455), the charm counc

terpart of the Σ (1385), but neither J nor P has been measured.

Σc (2520) MASSES
The masses are obtained from the mass-difference measurements that follow.

Σc (2520)++ MASSVALUE (MeV)EVTS

DOCUMENT ID

TECNCOMMENT

2518.41± 0.22 OUR FIT Error includes scale factor of 1.3.
• • • We do not use the following data for averages, fits, limits, etc. • • •1 AMMOSOV
2530 ± 5 ± 5693 HLBC ν p → µ− Σc (2530)++
1 AMMOSOV 93 sees a cluster of 6 events and estimates the background to be 1 event.

Σc (2520)+ MASSVALUE (MeV)

DOCUMENT ID

0.7
2517.4 +− 0.5 OUR FIT

Σc (2520)0 MASSVALUE (MeV)

DOCUMENT ID

2518.48± 0.21 OUR FIT

Error includes scale factor of 1.2.

Σc (2520) MASS DIFFERENCESm Σ (2520)++ − m Λ+c

VALUE (MeV)

c

EVTS

DOCUMENT ID

TECNCOMMENT

231.95± 0.18 OUR FIT Error includes scale factor of 1.8.
231.95± 0.16 OUR AVERAGE Error includes scale factor of 1.6. See the ideogram below.
231.99± 0.10 ± 0.02
44k
LEE
14 BELL e + e − at Υ(4S)
230.73± 0.56 ± 0.16
8.8k
AALTONEN
11H CDFp p at 1.96 TeV
231.5 ± 0.4 ± 0.3
1.3k
ATHAR
05 CLEO e + e − , 9.4–11.5 GeV
234.5 ± 1.1 ± 0.8677
BRANDENB... 97 CLE2 e + e − ≈ Υ(4S)

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Page 1Created: 5/31/2024 10:12

Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)

WEIGHTED AVERAGE
231.95±0.16 (Error scaled by 1.6)
Values above of weighted average, error,and scale factor are based upon the data inthis ideogram only. They are not necessarily the same as our ‘best’ values,
obtained from a least-squares constrained fit
utilizing measurements of other (related)
quantities as additional information.

χLEE
AALTONEN
ATHAR
BRANDENB...

1411H0597BELLCDF
CLEOCLE220.24.40.8

5.3(Confidence Level = 0.069)
229

230231232233234235m Σ (2520)++ − m + (MeV)Λccm Σ (2520)+ − m Λ+cc

VALUE (MeV)EVTS

DOCUMENT ID

TECNCOMMENT+ 0.7 OUR FIT
230.9 −0.5+ 0.7 OUR AVERAGE
230.9 −0.5+ 0.5
230.9± 0.5 −0.1
231.0± 1.1 ± 2.0

YELTON

21BELL

327

AMMAR01

CLE2e + e − at Υ(nS)
e + e − ≈ Υ(4S)

EVTS

DOCUMENT ID

TECNCOMMENTm Σ (2520)0 − m Λ+cc

VALUE (MeV)

232.02± 0.15 OUR FIT Error includes scale factor of 1.4.
232.02± 0.17 OUR AVERAGE Error includes scale factor of 1.5. See the ideogram below.
231.98± 0.11 ± 0.0441k
LEE
14 BELL e + e − at Υ(4S)
232.88± 0.43 ± 0.16
9.0k
AALTONEN
11H CDFp p at 1.96 TeV
231.4 ± 0.5 ± 0.3
1.3k
ATHAR
05 CLEO e + e − , 9.4–11.5 GeV
232.6 ± 1.0 ± 0.8504
BRANDENB... 97 CLE2 e + e − ≈ Υ(4S)

https://pdg.lbl.gov

Page 2Created: 5/31/2024 10:12

Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)

WEIGHTED AVERAGE
232.02±0.17 (Error scaled by 1.5)
Values above of weighted average, error,and scale factor are based upon the data inthis ideogram only. They are not necessarily the same as our ‘best’ values,
obtained from a least-squares constrained fit
utilizing measurements of other (related)
quantities as additional information.

χLEE
AALTONEN
ATHAR
BRANDENB...

1411H
05
97

BELL
CDF
CLEOCLE2

20.1
3.5
1.1

4.8
(Confidence Level = 0.093)
230

231

232233234235m Σ (2520)0 − m + (MeV)Λccm Σ (2520)++ − m Σ (2520)0c
VALUE (MeV)cEVTS

DOCUMENT ID

TECNCOMMENT

0.01± 0.15 ± 0.03
44/41kLEE
14 BELL e + e − at Υ(4S)• • • We do not use the following data for averages, fits, limits, etc. • • •2 ATHAR0.1 ± 0.8 ± 0.3
05 CLEO e + e − , 9.4–11.5 GeV
3
1.9 ± 1.4 ± 1.0
BRANDENB... 97 CLE2 e + e − ≈ Υ(4S)
2 This ATHAR 05 result is redundant with measurements in earlier entries.
3 This BRANDENBURG 97 result is redundant with measurements in earlier entries.

Σc (2520) WIDTHSΣc (2520)++ WIDTHVALUE (MeV)EVTS

DOCUMENT ID

TECNCOMMENT

BELL

e + e − at Υ(4S)+ 0.30 OUR AVERAGE
14.78 −
0.40+ 0.18
14.77± 0.25 −
0.30

44k

LEE

1415.03± 2.12 ± 1.36+ 1.6 ± 1.4
14.4 −
1.5+3.8 ± 4.0
17.9 − 3.2

8.8k

AALTONEN

11H CDF

1.3k

ATHAR05677

BRANDENB... 97

CLE2Page 3

Created: 5/31/2024 10:12

https://pdg.lbl.gov

p p at 1.96 TeV
CLEO e + e − , 9.4–11.5 GeVe + e − ≈ Υ(4S)

Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)Σc (2520)+ WIDTHVALUE (MeV)

CL%

EVTS+ 2.3 + 3.1
17.2 −
2.1 − 0.7

DOCUMENT ID

YELTON

21TECNCOMMENT

BELL

e + e − at Υ(nS)• • • We do not use the following data for averages, fits, limits, etc. • • •<1790327
AMMAR
01 CLE2 e + e − ≈ Υ(4S)Σc (2520)0 WIDTHVALUE (MeV)EVTS

DOCUMENT ID

TECNCOMMENT

BELL

e + e − at Υ(4S)+ 0.4 OUR AVERAGE
15.3 −
0.5+ 0.20
15.41± 0.41 −0.3241k

LEE1412.51± 1.82 ± 1.37+ 1.9 ± 1.4
16.6 −
1.7+
3.7 ± 4.0
13.0 − 3.09.0k

AALTONEN

11H CDF

1.3k

ATHAR

05504

BRANDENB... 97

p p at 1.96 TeV
CLEO e + e − , 9.4–11.5 GeV

CLE2e + e − ≈ Υ(4S)Σc (2520) DECAY MODES
Λ+ π is the only strong decay allowed to a Σc having this mass.
cΓ1ModeFraction (Γi /Γ)Λ+c π≈ 100 %Σc (2520) REFERENCESYELTONLEE
AALTONEN
ATHAR
AMMAR
BRANDENB...
AMMOSOV

211411H
05019793

PR D104 052003
J. Yelton et al.
PR D89 091102
S.-H. Lee et al.
PR D84 012003
T. Aaltonen et al.
PR D71 051101
S.B. Athar et al.
PRL 86 1167
R. Ammar et al.
PRL 78 2304
G. Brandenburg et al.
JETPL 58 247
V.V. Ammosov et al.
Translated from ZETFP 58 241.

https://pdg.lbl.gov

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