Roper resonance
id:
roper-resonance-295-4630141
title:
Roper resonance
text:
The Roper resonance, also known as P11(1440) or N(1440)1/2+, is an unstable nucleon resonance with a mass of about 1,440 MeV/c2 and with a relatively wide full Breit-Wigner width Γ ≈ 300 MeV/c2. It contains three quarks (up (u) or down (d)) with total spin J = 1/2 and total isospin I = 1/2. In the quark model it is considered to be a radially excited three-quark state with radial quantum number N = 2 and positive parity. The Roper Resonance has been a subject of many studies because its mass is
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wiki
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encyclopedia
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original url:
https://en.wikipedia.org/wiki/Roper_resonance
date created:
date modified:
2023-06-14T23:49:12Z
main entity:
{"identifier":"Q7366740","url":"https://www.wikidata.org/entity/Q7366740"}
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13
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