A study of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msubsup><a:mi mathvariant="normal">Λ</a:mi><a:mi>b</a:mi><a:mn>0</a:mn></a:msubsup></a:math> and <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:msubsup><d:mi mathvariant="normal">Ξ</d:mi><d:mi>b</d:mi><d:mn>0</d:mn></d:msubsup></d:math> decays to <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:mrow><g:mi mathvariant="normal">Λ</g:mi><g:msup><g:mrow><g:mi>h</g:mi></g:mrow><g:mrow><g:mo>+</g:mo></g:mrow></g:msup><g:msup><g:mrow><g:mi>h</g:mi></g:mrow><g:mrow><g:mo>′</g:mo><g:mo>−</g:mo></g:mrow></g:msup></g:mrow></g:math> (<j:math xmlns:j="http://www.w3.org/1998/Math/MathML" display="inline"><j:mrow><j:msup><j:mrow><j:mi>h</j:mi></j:mrow><j:mrow><j:mo stretchy="false">(</j:mo><j:mo>′</j:mo><j:mo stretchy="false">)</j:mo></j:mrow></j:msup><j:mo>=</j:mo><j:mi>π</j:mi><j:mo>,</j:mo><j:mi>K</j:mi></j:mrow></j:math>) is performed using <n:math xmlns:n="http://www.w3.org/1998/Math/MathML" display="inline"><n:mi>p</n:mi><n:mi>p</n:mi></n:math> collision data collected by the LHCb experiment during LHC Runs 1–2, corresponding to an integrated luminosity of <p:math xmlns:p="http://www.w3.org/1998/Math/MathML" display="inline"><p:mn>9</p:mn><p:mtext> </p:mtext><p:mtext> </p:mtext><p:msup><p:mi>fb</p:mi><p:mrow><p:mo>−</p:mo><p:mn>1</p:mn></p:mrow></p:msup></p:math>. The branching fractions for these decays are measured using the <r:math xmlns:r="http://www.w3.org/1998/Math/MathML" display="inline"><r:mrow><r:msubsup><r:mrow><r:mi mathvariant="normal">Λ</r:mi></r:mrow><r:mrow><r:mi>b</r:mi></r:mrow><r:mrow><r:mn>0</r:mn></r:mrow></r:msubsup><r:mo stretchy="false">→</r:mo><r:msubsup><r:mrow><r:mi mathvariant="normal">Λ</r:mi></r:mrow><r:mrow><r:mi>c</r:mi></r:mrow><r:mrow><r:mo>+</r:mo></r:mrow></r:msubsup><r:mo stretchy="false">(</r:mo><r:mo stretchy="false">→</r:mo><r:mi mathvariant="normal">Λ</r:mi><r:msup><r:mrow><r:mi>π</r:mi></r:mrow><r:mrow><r:mo>+</r:mo></r:mrow></r:msup><r:mo stretchy="false">)</r:mo><r:msup><r:mrow><r:mi>π</r:mi></r:mrow><r:mrow><r:mo>−</r:mo></r:mrow></r:msup></r:mrow></r:math> decay as a control channel. The decays <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML" display="inline"><ab:msubsup><ab:mi mathvariant="normal">Λ</ab:mi><ab:mi>b</ab:mi><ab:mn>0</ab:mn></ab:msubsup><ab:mo stretchy="false">→</ab:mo><ab:mrow><ab:mi mathvariant="normal">Λ</ab:mi><ab:msup><ab:mi>π</ab:mi><ab:mo>+</ab:mo></ab:msup><ab:msup><ab:mi>π</ab:mi><ab:mo>−</ab:mo></ab:msup></ab:mrow></ab:math> and <fb:math xmlns:fb="http://www.w3.org/1998/Math/MathML" display="inline"><fb:msubsup><fb:mi mathvariant="normal">Ξ</fb:mi><fb:mi>b</fb:mi><fb:mn>0</fb:mn></fb:msubsup><fb:mo stretchy="false">→</fb:mo><fb:mrow><fb:mi mathvariant="normal">Λ</fb:mi><fb:msup><fb:mi>K</fb:mi><fb:mo>−</fb:mo></fb:msup><fb:msup><fb:mi>π</fb:mi><fb:mo>+</fb:mo></fb:msup></fb:mrow></fb:math> are observed for the first time. For decay modes with sufficient signal yields, <kb:math xmlns:kb="http://www.w3.org/1998/Math/MathML" display="inline"><kb:mi>C</kb:mi><kb:mi>P</kb:mi></kb:math> asymmetries are measured in the full and localized regions of the final-state phase space. Evidence is found for <mb:math xmlns:mb="http://www.w3.org/1998/Math/MathML" display="inline"><mb:mi>C</mb:mi><mb:mi>P</mb:mi></mb:math> violation in the <ob:math xmlns:ob="http://www.w3.org/1998/Math/MathML" display="inline"><ob:msubsup><ob:mi mathvariant="normal">Λ</ob:mi><ob:mi>b</ob:mi><ob:mn>0</ob:mn></ob:msubsup><ob:mo stretchy="false">→</ob:mo><ob:mi mathvariant="normal">Λ</ob:mi><ob:msup><ob:mi>K</ob:mi><ob:mo>+</ob:mo></ob:msup><ob:msup><ob:mi>K</ob:mi><ob:mo>−</ob:mo></ob:msup></ob:math> decay, interpreted as originating primarily from an asymmetric <tb:math xmlns:tb="http://www.w3.org/1998/Math/MathML" display="inline"><tb:msubsup><tb:mi mathvariant="normal">Λ</tb:mi><tb:mi>b</tb:mi><tb:mn>0</tb:mn></tb:msubsup><tb:mo stretchy="false">→</tb:mo><tb:msup><tb:mi>N</tb:mi><tb:mrow><tb:mo>*</tb:mo><tb:mo>+</tb:mo></tb:mrow></tb:msup><tb:msup><tb:mi>K</tb:mi><tb:mo>−</tb:mo></tb:msup></tb:math> decay amplitude. The measured <xb:math xmlns:xb="http://www.w3.org/1998/Math/MathML" display="inline"><xb:mi>C</xb:mi><xb:mi>P</xb:mi></xb:math> asymmetries for other decays are compatible with zero. © 2025 CERN, for the LHCb Collaboration 2025 CERN