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Journal Article

Study of the D0p amplitude in Λ0b → D0- decays

MPS-Authors
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Blouw,  J.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Popov,  D.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Schmelling,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertiaev,  M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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1701.07873.pdf
(Preprint), 3MB

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Citation

LHCb collaboration, Aaij, R., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2017). Study of the D0p amplitude in Λ0b → D0- decays. Journal of high energy physics: JHEP, 2017: 30. doi:10.1007/JHEP05(2017)030.


Cite as: https://hdl.handle.net/21.11116/0000-0005-8860-5
Abstract
An amplitude analysis of the decay $\Lambda_b^0\to D^0 p \pi^-$ is performed
in the part of the phase space containing resonances in the $D^0 p$ channel.
The study is based on a data sample corresponding to an integrated luminosity
of 3.0 fb$^{-1}$ of $pp$ collisions recorded by the LHCb experiment. The
spectrum of excited $\Lambda_c^+$ states that decay into $D^0 p$ is studied.
The masses, widths and quantum numbers of the $\Lambda_c(2880)^+$ and
$\Lambda_c(2940)^+$ resonances are measured. The constraints on the spin and
parity for the $\Lambda_c(2940)^+$ state are obtained for the first time. A
near-threshold enhancement in the $D^0 p$ amplitude is investigated and found
to be consistent with a new resonance, denoted the $\Lambda_c(2860)^+$, of spin
$3/2$ and positive parity.