TY - JOUR
T1 - Precision spectroscopy with COMPASS and the observation of a new iso-vector resonance
AU - Paul, Stephan
PY - 2014
Y1 - 2014
N2 - We report on the results of a novel partial-wave analysis based on 50 ? 106 events from the reaction π- + p → π-π-π+ + precoil at 190? GeV/c incoming beam momentum using the COMPASS spectrometer. A separated analysis in bins of m3π and four-momentum transfer t′ reveals the interference of resonant and non-resonant particle production and allows their spectral separation. Besides well known resonances we observe a new iso-vector meson a1(1420) at a mass of 1420? MeV/c2 in the f0(980)π final state only, the origin of which is unclear. We have also examined the structure of the 0++ππ-isobar in the JPC = 0-+, 1++, 2-+ three pion waves. This clearly reveals the various 0++ππ-isobar components and its correlation to the decay of light mesons.
AB - We report on the results of a novel partial-wave analysis based on 50 ? 106 events from the reaction π- + p → π-π-π+ + precoil at 190? GeV/c incoming beam momentum using the COMPASS spectrometer. A separated analysis in bins of m3π and four-momentum transfer t′ reveals the interference of resonant and non-resonant particle production and allows their spectral separation. Besides well known resonances we observe a new iso-vector meson a1(1420) at a mass of 1420? MeV/c2 in the f0(980)π final state only, the origin of which is unclear. We have also examined the structure of the 0++ππ-isobar in the JPC = 0-+, 1++, 2-+ three pion waves. This clearly reveals the various 0++ππ-isobar components and its correlation to the decay of light mesons.
UR - http://www.scopus.com/inward/record.url?scp=84903455174&partnerID=8YFLogxK
U2 - 10.1051/epjconf/20147303002
DO - 10.1051/epjconf/20147303002
M3 - Conference article
AN - SCOPUS:84903455174
SN - 2101-6275
VL - 73
JO - EPJ Web of Conferences
JF - EPJ Web of Conferences
M1 - 03002
T2 - 13th International Conference Meson-Nucleon Physics and the Structure of the Nucleon, MENU 2013
Y2 - 30 September 2013 through 4 October 2013
ER -