Search for the rare decay of charmed baryon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup></mml:math> into the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> final state


Aaij, R ORCID: 0000-0003-0533-1952, Abdelmotteleb, ASW ORCID: 0000-0001-7905-0542, Abellan Beteta, C, Abudinén, F ORCID: 0000-0002-6737-3528, Ackernley, T ORCID: 0000-0002-5951-3498, Adefisoye, AA ORCID: 0000-0003-2448-1550, Adeva, B ORCID: 0000-0001-9756-3712, Adinolfi, M ORCID: 0000-0002-1326-1264, Adlarson, P ORCID: 0000-0001-6280-3851, Agapopoulou, C ORCID: 0000-0002-2368-0147 et al (show 1077 more authors) (2024) Search for the rare decay of charmed baryon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi mathvariant="normal">Λ</mml:mi><mml:mi>c</mml:mi><mml:mo>+</mml:mo></mml:msubsup></mml:math> into the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>μ</mml:mi><mml:mo>−</mml:mo></mml:msup></mml:math> final state. Physical Review D, 110 (5). 052007-. ISSN 2470-0010, 2470-0029

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Abstract

<jats:p>A search for the nonresonant <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msubsup><a:mi mathvariant="normal">Λ</a:mi><a:mi>c</a:mi><a:mo>+</a:mo></a:msubsup><a:mo stretchy="false">→</a:mo><a:mrow><a:mi>p</a:mi><a:mrow><a:msup><a:mi>μ</a:mi><a:mo>+</a:mo></a:msup><a:msup><a:mi>μ</a:mi><a:mo>−</a:mo></a:msup></a:mrow></a:mrow></a:math> decay is performed using proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the LHCb experiment, corresponding to an integrated luminosity of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mn>5.4</e:mn><e:mtext> </e:mtext><e:mtext> </e:mtext><e:msup><e:mi>fb</e:mi><e:mrow><e:mo>−</e:mo><e:mn>1</e:mn></e:mrow></e:msup></e:math>. No evidence for the decay is found in the dimuon invariant-mass regions where the expected contributions of resonances is subdominant. The upper limit on the branching fraction of the <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:msubsup><g:mi mathvariant="normal">Λ</g:mi><g:mi>c</g:mi><g:mo>+</g:mo></g:msubsup><g:mo stretchy="false">→</g:mo><g:mrow><g:mi>p</g:mi><g:mrow><g:msup><g:mi>μ</g:mi><g:mo>+</g:mo></g:msup><g:msup><g:mi>μ</g:mi><g:mo>−</g:mo></g:msup></g:mrow></g:mrow></g:math> decay is determined to be <k:math xmlns:k="http://www.w3.org/1998/Math/MathML" display="inline"><k:mrow><k:mn>2.9</k:mn><k:mo stretchy="false">(</k:mo><k:mn>3.2</k:mn><k:mo stretchy="false">)</k:mo><k:mo>×</k:mo><k:msup><k:mrow><k:mn>10</k:mn></k:mrow><k:mrow><k:mo>−</k:mo><k:mn>8</k:mn></k:mrow></k:msup><k:mtext> </k:mtext><k:mtext> </k:mtext><k:mtext>at</k:mtext><k:mtext> </k:mtext><k:mtext> </k:mtext><k:mn>90</k:mn><k:mo>%</k:mo><k:mo stretchy="false">(</k:mo><k:mn>95</k:mn><k:mo>%</k:mo><k:mo stretchy="false">)</k:mo></k:mrow></k:math> confidence level. The branching fractions in the dimuon invariant-mass regions dominated by the <q:math xmlns:q="http://www.w3.org/1998/Math/MathML" display="inline"><q:mi>η</q:mi></q:math>, <s:math xmlns:s="http://www.w3.org/1998/Math/MathML" display="inline"><s:mi>ρ</s:mi></s:math> and <u:math xmlns:u="http://www.w3.org/1998/Math/MathML" display="inline"><u:mi>ω</u:mi></u:math> resonances are also determined.</jats:p> <jats:sec> <jats:title/> <jats:supplementary-material> <jats:permissions> <jats:copyright-statement>© 2024 CERN, for the LHCb Collaboration</jats:copyright-statement> <jats:copyright-year>2024</jats:copyright-year> <jats:copyright-holder>CERN</jats:copyright-holder> </jats:permissions> </jats:supplementary-material> </jats:sec>

Item Type: Article
Uncontrolled Keywords: 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences
Divisions: Faculty of Humanities and Social Sciences
Faculty of Science and Engineering
Faculty of Science and Engineering > School of Physical Sciences
Faculty of Humanities and Social Sciences > School of the Arts
Depositing User: Symplectic Admin
Date Deposited: 14 Oct 2024 07:30
Last Modified: 09 Dec 2024 16:29
DOI: 10.1103/physrevd.110.052007
Open Access URL: https://journals.aps.org/prd/pdf/10.1103/PhysRevD....
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3185041
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