Isovector

In particle physics, isovector refers to the vector transformation of a particle under the SU(2) group of isospin.{{cite journal |last1=Bracco |first1=A.|author1-link=Angela Bracco |last2=Lanza |first2=E. G. |last3=Tamii |first3=A. |title=Isoscalar and isovector dipole excitations: Nuclear properties from low-lying states and from the isovector giant dipole resonance |journal=Progress in Particle and Nuclear Physics |date=1 May 2019 |volume=106 |pages=360–433 |doi=10.1016/j.ppnp.2019.02.001 |s2cid=127928945 |language=en |issn=0146-6410|doi-access=free |bibcode=2019PrPNP.106..360B |hdl=2434/716331 |hdl-access=free }} An isovector state is a triplet state with total isospin 1, with the third component of isospin either 1, 0, or -1, much like a triplet state in the two-particle addition of Spin.