Possible interpretation of the newly observed Ωb states
Inspired by the newly observed Ω b states by the LHCb Collaboration, we investigate the two-body strong decays of the low-lying λ -mode Ω b baryons up to N = 2 shell using the chiral quark model within the j - j coupling scheme. Our results indicate that: (i) the newly observed states Ω b ( 6316 ) -...
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Published in | The European physical journal. C, Particles and fields Vol. 80; no. 3 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.03.2020
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Inspired by the newly observed
Ω
b
states by the LHCb Collaboration, we investigate the two-body strong decays of the low-lying
λ
-mode
Ω
b
baryons up to
N
=
2
shell using the chiral quark model within the
j
-
j
coupling scheme. Our results indicate that: (i) the newly observed states
Ω
b
(
6316
)
-
and
Ω
b
(
6330
)
-
are good candidates of the light spin
j
=
1
states, while the spin-parity
J
P
=
1
/
2
-
and
J
P
=
3
/
2
-
cannot be distinguished. The other two states,
Ω
b
(
6340
)
and
Ω
b
(
6350
)
mostly correspond to the light spin
j
=
2
states, while the spin-parity
J
P
=
3
/
2
-
and
J
P
=
5
/
2
-
cannot be distinguished as well. (ii) The 2
S
states with spin-parity
J
P
=
1
/
2
+
and
J
P
=
3
/
2
+
, respectively, might be narrow states with a width of
Γ
<
2
MeV. (iii) The 1
D
states are not broad and the total decay widths vary from several to dozens of MeV, which have a good potential to be observed in future experiments. |
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ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-020-7823-z |