Quantum mechanics

Meson

Invariant mass

State (computer science)

Luminosity

Nuclear physics

Computer science

Physics

Annihilation

Galaxy

Particle physics

Algorithm

Isospin

Physical Review Letters

We have observed a narrow state near 2.32 GeV/c2 in the inclusive D+sπ0 invariant mass distribution from e+e− annihilation data at energies near 10.6 GeV. The observed width is consistent with the experimental resolution. The small intrinsic width and the quantum numbers of the final state indicate that the decay violates isospin conservation. The state has natural spin-parity and the low mass suggests a JP=0+ assignment. The data sample corresponds to an integrated luminosity of 91 fb−1 recorded by the BABAR detector at the SLAC PEP-II asymmetric-energy e+e− storage ring.Received 11 April 2003DOI:https://doi.org/10.1103/PhysRevLett.90.242001©2003 American Physical Society

Observation of a Narrow Meson State Decaying to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mi>D</mml:mi><mml:mi>s</mml:mi><mml:mo>+</mml:mo></mml:msubsup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>at a Mass of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2.32</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi mathvariant="normal">G</mml:mi><mml:mi mathvariant="normal">e</mml…

Observation of a Narrow Meson State Decaying toDs+π0at a Mass of2.32 Ge