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Observation of the Λb0→J/ψΞ-K+ and Ξb0→J/ψΞ-π+ decays.

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Title: Observation of the Λb0→J/ψΞ-K+ and Ξb0→J/ψΞ-π+ decays.
Authors: LHCb Collaboration (AUTHOR), Aaij, R.1 (AUTHOR), Abdelmotteleb, A. S. W.2 (AUTHOR), Beteta, C. Abellan3 (AUTHOR), Abudinén, F.2 (AUTHOR), Ackernley, T.4 (AUTHOR), Adefisoye, A. A.5 (AUTHOR), Adeva, B.6 (AUTHOR), Adinolfi, M.7 (AUTHOR), Adlarson, P.8 (AUTHOR), Agapopoulou, C.9 (AUTHOR), Aidala, C. A.10 (AUTHOR), Ajaltouni, Z.11 (AUTHOR), Akar, S.12 (AUTHOR), Akiba, K.1 (AUTHOR), Albicocco, P.13 (AUTHOR), Albrecht, J.14,15 (AUTHOR), Alessio, F.16 (AUTHOR), Alexander, M.17 (AUTHOR), Aliouche, Z.18 (AUTHOR)
Source: European Physical Journal C -- Particles & Fields. Jul2025, Vol. 85 Issue 7, p1-15. 15p.
Subjects: Branching ratios, Large Hadron Collider, Particle physics, Baryons, Radioactive decay, Proton-proton interactions, Vector mesons
Abstract: The first observation of the Ξ b 0 → J / ψ Ξ - π + decay and the most precise measurement of the branching fraction of the Λ b 0 → J / ψ Ξ - K + decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13 \,Te V , corresponding to an integrated luminosity of 5.4 \,fb - 1 . Using the Λ b 0 → J / ψ Λ and Ξ b - → J / ψ Ξ - decays as normalisation channels, the ratios of branching fractions are measured to be B ( Λ b 0 → J / ψ Ξ - K +) B ( Λ b 0 → J / ψ Λ) = (1.17 ± 0.14 ± 0.08) × 10 - 2 , B ( Ξ b 0 → J / ψ Ξ - π +) B ( Ξ b - → J / ψ Ξ -) = (11.9 ± 1.4 ± 0.6) × 10 - 2 , where the first uncertainty is statistical and the second systematic. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Observation of the Λb0→J/ψΞ-K+ and Ξb0→J/ψΞ-π+ decays.
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  Data: <searchLink fieldCode="AR" term="%22LHCb Collaboration%22">LHCb Collaboration</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aaij%2C+R%2E%22">Aaij, R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abdelmotteleb%2C+A%2E+S%2E+W%2E%22">Abdelmotteleb, A. S. W.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Beteta%2C+C%2E+Abellan%22">Beteta, C. Abellan</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abudinén%2C+F%2E%22">Abudinén, F.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ackernley%2C+T%2E%22">Ackernley, T.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Adefisoye%2C+A%2E+A%2E%22">Adefisoye, A. A.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Adeva%2C+B%2E%22">Adeva, B.</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Adinolfi%2C+M%2E%22">Adinolfi, M.</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Adlarson%2C+P%2E%22">Adlarson, P.</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Agapopoulou%2C+C%2E%22">Agapopoulou, C.</searchLink><relatesTo>9</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aidala%2C+C%2E+A%2E%22">Aidala, C. A.</searchLink><relatesTo>10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ajaltouni%2C+Z%2E%22">Ajaltouni, Z.</searchLink><relatesTo>11</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Akar%2C+S%2E%22">Akar, S.</searchLink><relatesTo>12</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Akiba%2C+K%2E%22">Akiba, K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Albicocco%2C+P%2E%22">Albicocco, P.</searchLink><relatesTo>13</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Albrecht%2C+J%2E%22">Albrecht, J.</searchLink><relatesTo>14,15</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alessio%2C+F%2E%22">Alessio, F.</searchLink><relatesTo>16</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alexander%2C+M%2E%22">Alexander, M.</searchLink><relatesTo>17</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aliouche%2C+Z%2E%22">Aliouche, Z.</searchLink><relatesTo>18</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. Jul2025, Vol. 85 Issue 7, p1-15. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Branching+ratios%22">Branching ratios</searchLink><br /><searchLink fieldCode="DE" term="%22Large+Hadron+Collider%22">Large Hadron Collider</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+physics%22">Particle physics</searchLink><br /><searchLink fieldCode="DE" term="%22Baryons%22">Baryons</searchLink><br /><searchLink fieldCode="DE" term="%22Radioactive+decay%22">Radioactive decay</searchLink><br /><searchLink fieldCode="DE" term="%22Proton-proton+interactions%22">Proton-proton interactions</searchLink><br /><searchLink fieldCode="DE" term="%22Vector+mesons%22">Vector mesons</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The first observation of the Ξ b 0 → J / ψ Ξ - π + decay and the most precise measurement of the branching fraction of the Λ b 0 → J / ψ Ξ - K + decay are reported, using proton-proton collision data from the LHCb experiment collected in 2016–2018 at a centre-of-mass energy of 13 \,Te V , corresponding to an integrated luminosity of 5.4 \,fb - 1 . Using the Λ b 0 → J / ψ Λ and Ξ b - → J / ψ Ξ - decays as normalisation channels, the ratios of branching fractions are measured to be B ( Λ b 0 → J / ψ Ξ - K +) B ( Λ b 0 → J / ψ Λ) = (1.17 ± 0.14 ± 0.08) × 10 - 2 , B ( Ξ b 0 → J / ψ Ξ - π +) B ( Ξ b - → J / ψ Ξ -) = (11.9 ± 1.4 ± 0.6) × 10 - 2 , where the first uncertainty is statistical and the second systematic. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Branching ratios
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