Weak-decay searches for Qsu¯d¯ tetraquarks
We propose to search for the open heavy-flavor exotic states with the quark components of Q s u ¯ d ¯ with Q = b , c via their weak decays. If there exist such exotic states below the BK or DK thresholds, they can only decay weakly. The advantages include: (i) the experimental backgrounds from the s...
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| Published in | The European physical journal. C, Particles and fields Vol. 82; no. 7 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.07.2022
Springer Nature B.V |
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| Abstract | We propose to search for the open heavy-flavor exotic states with the quark components of
Q
s
u
¯
d
¯
with
Q
=
b
,
c
via their weak decays. If there exist such exotic states below the
BK
or
DK
thresholds, they can only decay weakly. The advantages include: (i) the experimental backgrounds from the secondary decay vertex are much lower due to the long lifetimes, (ii) the productions are large enough for only one heavy quark in such states, (iii) the thresholds of
BK
or
DK
are about 260 MeV higher compared to the
B
s
π
or
D
s
π
thresholds of the configurations of
Q
u
s
¯
d
¯
or
Q
d
s
¯
u
¯
, with a higher possibility to exist such weakly-decay particles, and (iv) if observed, their inner structures are easier understood since they can not be induced by the kinematic effects. |
|---|---|
| AbstractList | We propose to search for the open heavy-flavor exotic states with the quark components of Qsu¯d¯ with Q=b,c via their weak decays. If there exist such exotic states below the BK or DK thresholds, they can only decay weakly. The advantages include: (i) the experimental backgrounds from the secondary decay vertex are much lower due to the long lifetimes, (ii) the productions are large enough for only one heavy quark in such states, (iii) the thresholds of BK or DK are about 260 MeV higher compared to the Bsπ or Dsπ thresholds of the configurations of Qus¯d¯ or Qds¯u¯, with a higher possibility to exist such weakly-decay particles, and (iv) if observed, their inner structures are easier understood since they can not be induced by the kinematic effects. We propose to search for the open heavy-flavor exotic states with the quark components of Q s u ¯ d ¯ with Q = b , c via their weak decays. If there exist such exotic states below the BK or DK thresholds, they can only decay weakly. The advantages include: (i) the experimental backgrounds from the secondary decay vertex are much lower due to the long lifetimes, (ii) the productions are large enough for only one heavy quark in such states, (iii) the thresholds of BK or DK are about 260 MeV higher compared to the B s π or D s π thresholds of the configurations of Q u s ¯ d ¯ or Q d s ¯ u ¯ , with a higher possibility to exist such weakly-decay particles, and (iv) if observed, their inner structures are easier understood since they can not be induced by the kinematic effects. |
| Author | Yu, Fu-Sheng |
| Author_xml | – sequence: 1 givenname: Fu-Sheng surname: Yu fullname: Yu, Fu-Sheng email: yufsh@lzu.edu.cn organization: School of Nuclear Science and Technology, Lanzhou University, Frontiers Science Center for Rare Isotopes, and Lanzhou Center for Theoretical Physics, and Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, Center for High Energy Physics, Peking University |
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| DOI | 10.1140/epjc/s10052-022-10567-8 |
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| Snippet | We propose to search for the open heavy-flavor exotic states with the quark components of
Q
s
u
¯
d
¯
with
Q
=
b
,
c
via their weak decays. If there exist such... We propose to search for the open heavy-flavor exotic states with the quark components of Qsu¯d¯ with Q=b,c via their weak decays. If there exist such exotic... |
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| SubjectTerms | Astronomy Astrophysics and Cosmology Elementary Particles Hadrons Heavy Ions Kinematics Lifetime Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Particle decay Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quarks Regular Article - Theoretical Physics String Theory Theoretical physics Thresholds |
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| Title | Weak-decay searches for Qsu¯d¯ tetraquarks |
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