Study of the $D^0 p$ amplitude in $\Lambda_b^0\to D^0 p \pi^-$ decays - INSPIRE

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Study of the $D^0 p$ amplitude in $\Lambda_b^0\to D^0 p \pi^-$ decays

LHCb

Collaboration

Jan 26, 2017

41 pages

Published in:

JHEP 05 (2017) 030

Published: May 5, 2017

e-Print:

1701.07873 [hep-ex]

DOI:

10.1007/JHEP05(2017)030

PDG:

{{\mathit \Lambda}_{{{c}}}{(2940)}^{+}}

Report number:

CERN-EP-2017-007,
LHCB-PAPER-2016-061

Experiments:

CERN-LHC-LHCb

View in:

reference search120 citations

Citations per year

Abstract: (Springer)

An amplitude analysis of the decay Λ

_{b}^{0}

→ D

^{0}

pπ

^{−}

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 Λ

_{c}^{+}

states that decay into D

^{0}

p is studied. The masses, widths and quantum numbers of the Λ

_{c}

(2880)

^{+}

and Λ

_{c}

(2940)

^{+}

resonances are measured. The constraints on the spin and parity for the Λ

_{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 Λ

_{c}

(2860)

^{+}

, of spin 3/2 and positive parity.

Note:

Replaced with version published in JHEP. All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-061.html

B physics
Charm physics
Hadron-Hadron scattering (experiments)
QCD
Spectroscopy
p p: colliding beams
Lambda/b0: hadronic decay
decay: amplitude analysis
p p: scattering
spin: resonance

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