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Interpretations of the new LHCb Pc(4337)+ pentaquark state
Recently the LHCb Collaboration has observed a new pentaquark state, the P c ( 4337 ) + . Owing to its proximity to the χ c 0 ( 1 S ) p , D ¯ ∗ Λ c , D ¯ Σ c and D ¯ Σ c ∗ thresholds, this new pentaquark might very well be a meson–baryon bound state. However its spin and parity have not been determi...
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Published in: | The European physical journal. C, Particles and fields Particles and fields, 2022-06, Vol.82 (6) |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | Recently the LHCb Collaboration has observed a new pentaquark state, the
P
c
(
4337
)
+
. Owing to its proximity to the
χ
c
0
(
1
S
)
p
,
D
¯
∗
Λ
c
,
D
¯
Σ
c
and
D
¯
Σ
c
∗
thresholds, this new pentaquark might very well be a meson–baryon bound state. However its spin and parity have not been determined yet and none of the previous possibilities can be ruled out.We briefly explore a few of these options and the consequences they entail in the present manuscript: (i) the
P
c
(
4337
)
+
might be a
χ
c
0
(
1
S
)
p
bound state, (ii) the
P
c
(
4312
)
+
and
P
c
(
4337
)
+
might be
D
¯
∗
Λ
c
and
D
¯
Σ
c
states close to threshold, respectively, where the Breit–Wigner mass might not correspond to the location of the poles, (iii) the locations of the
P
c
(
4312
)
+
and
P
c
(
4337
)
+
might be explained in terms of the
D
¯
∗
Λ
c
-
D
¯
Σ
c
and
D
¯
∗
Λ
c
-
D
¯
Σ
c
∗
coupled channel dynamics. This last option, though not the most probable explanation, is still potentially compatible with the double peak solution of the
P
cs
(
4459
)
0
and with what we know of the
P
c
(
4312
)
+
. As a byproduct of the previous explorations, we conjecture the existence of a series of anticharmed meson – antitriplet charmed baryon bound states and calculate their masses. |
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ISSN: | 1434-6044 1434-6052 |
DOI: | 10.1140/epjc/s10052-022-10522-7 |