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Multigap superconductivity in chiral noncentrosymmetric <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>TaRh</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">B</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
We report the observation of multigap superconductivity in ${\mathrm{TaRh}}_{2}{\mathrm{B}}_{2}$. We show ${\mathrm{TaRh}}_{2}{\mathrm{B}}_{2}$ is a bulk type-II superconductor with a transition temperature ${T}_{\mathrm{c}}=6.00(5)$ K. We present transverse-field muon spin relaxation data where the superconducting gap can be fit using a two-gap $\left(s+s\right)$-wave model. We also report the zero-field electronic specific heat …