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Amplitude analysis of B0→ηc(1S)K+π- decays.

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Title: Amplitude analysis of B0→ηc(1S)K+π- decays.
Authors: 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.11 (AUTHOR), Akiba, K.1 (AUTHOR), Albicocco, P.12 (AUTHOR), Albrecht, J.13,14 (AUTHOR), Aleksiejunas, R.15 (AUTHOR), Alessio, F.16 (AUTHOR), Cartelle, P. Alvarez17 (AUTHOR), Amalric, R.18 (AUTHOR)
Source: European Physical Journal C -- Particles & Fields. May2026, Vol. 86 Issue 5, p1-20. 20p.
Subjects: Hadron decay, Branching ratios, Particle physics, Particle analysis, Resonance, Particle detectors
Abstract: An amplitude analysis of the B 0 → η c (1 S) K + π - decays with η c (1 S) → p p ¯ is performed using a sample corresponding to an integrated luminosity of 9 fb - 1 of p p collision data collected by the LHCb detector at centre-of-mass energies of s = 7, 8 and 13 Te V . The data are described with a model including only intermediate contributions from known K ∗ 0 resonances. Evidence for an exotic resonance in the η c (1 S) π - system, reported in a previous analysis of this decay channel, is not confirmed. The inclusive branching fraction of the B 0 → η c (1 S) K + π - decays is measured to be B (B 0 → η c (1 S) K + π -) = (5.82 ± 0.20 ± 0.23 ± 0.55) × 10 - 4 , where the first uncertainty is statistical, the second systematic, and the third arises from the limited knowledge of external branching fractions. [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: Amplitude analysis of B0→ηc(1S)K+π- decays.
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  Data: <searchLink fieldCode="AR" term="%22Aaij%2C+R%2E%22">Aaij, R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abdelmotteleb%2C+A%2ES%2EW%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>11</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>12</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Albrecht%2C+J%2E%22">Albrecht, J.</searchLink><relatesTo>13,14</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aleksiejunas%2C+R%2E%22">Aleksiejunas, R.</searchLink><relatesTo>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="%22Cartelle%2C+P%2E+Alvarez%22">Cartelle, P. Alvarez</searchLink><relatesTo>17</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Amalric%2C+R%2E%22">Amalric, R.</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>. May2026, Vol. 86 Issue 5, p1-20. 20p.
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  Data: An amplitude analysis of the B 0 → η c (1 S) K + π - decays with η c (1 S) → p p ¯ is performed using a sample corresponding to an integrated luminosity of 9 fb - 1 of p p collision data collected by the LHCb detector at centre-of-mass energies of s = 7, 8 and 13 Te V . The data are described with a model including only intermediate contributions from known K ∗ 0 resonances. Evidence for an exotic resonance in the η c (1 S) π - system, reported in a previous analysis of this decay channel, is not confirmed. The inclusive branching fraction of the B 0 → η c (1 S) K + π - decays is measured to be B (B 0 → η c (1 S) K + π -) = (5.82 ± 0.20 ± 0.23 ± 0.55) × 10 - 4 , where the first uncertainty is statistical, the second systematic, and the third arises from the limited knowledge of external branching fractions. [ABSTRACT FROM AUTHOR]
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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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