6533b82afe1ef96bd128c047
RESEARCH PRODUCT
Observation of a New Narrow Axial-Vector Mesona1(1420)
F. TessarottoT. SzameitatBakur ParsamyanK. KlimaszewskiD.i. RyabchikovA.s. NunesD. PanzieriK. SchmidtAndrea FerreroT. GrussenmeyerT. SchlüterK. ZarembaV.a. PolyakovJ. LichtenstadtNorihiro DoshitaE. M. KabußN. D'hoseG. SbrizzaiI.a. SavinM. BoerS. U. ChungS. U. ChungS. U. ChungA. MagnonM. WilfertM. ViriusS. GrabmüllerAnne-laure MartinH. SchmiedenA. AmorosoP. BordaloC. QuintansN. Du Fresne Von HohenescheN. Du Fresne Von HohenescheAndres CicuttinI. OrlovG. ReicherzB. GrubeJ.m. FriedrichN. KuchinskiA. SrnkaE. RoccoF. ThibaudJ. BarthM. LevillainS. DasguptaS. SarkarJ. BisplinghoffD. Von HarrachS. HuberS. Dalla TorreVladimir NikolaenkoR. HashimotoC. AdolphF. KunneV. FrolovSoumen PaulA.b. IvanovM. GorzellikV.f. KonstantinovZ.v. KroumchteinC. MarchandGerhard K. MallotE. ZemlyanichkinaAlexandr SelyuninP.d. EversheimJ. PochodzallaR. AkhunzyanovH. SuzukiH. SuzukiMiroslav SulcS. WallnerM. FaesslerF. HinterbergerP. JörgR. JoostenC.d.r. AzevedoO. KouznetsovFrank KleinG.v. KhaustovS. IshimotoW. EyrichI. J. ChoiNour MakkeC. RegaliP. SznajderFranco BradamanteH. FischerO.p. GavrichtchoukMartin BodlakW. C. ChangY. BedferY. BedferO.yu. ShevchenkoA.g. OlshevskyK. KönigsmannR. JahnS. LevoratoM. Grosse-perdekampS. SchmeingF. NerlingT. NagelL. SinhaT. WeisrockT. MatsudaA. ZinkA.v. EfremovG. D. AlexeevS. PlatchkovJ. PretzJ. PretzYu. IvanshinM. QuaresmaA. LehmannQ. CurielP. SchiavonW. MeyerMaria Liz CrespoL. DharaC. BraunS. GerassimovN. HorikawaN. HorikawaD.v. PeshekhonovY. MiyachiNaomi C R MakinsA.a. LednevW. DünnweberSergey DonskovA. MaggioraV. JaryH. MatsudaB. BadelekR.p. KurjataS. TessaroD. HahneT. MichigamiG.v. MeshcheryakovM. FingerM. ZiembickiF. KrinnerJ.f.c.a. VelosoV.n. KolosovS. SirtlM.g. AlexeevS. UhlJ. MarzecB. KetzerB. KetzerS. TakekawaYu. KisselevF. PereiraS. RamosM. V. ZavertyaevMichal DziewieckiA. RychterJ. NovyJ. NovyV.d. SamoylenkoV. TskhayF. H. HeinsiusI. GnesiA. SandaczC.-yu. HsiehM. OstrickA. AustregesiloA. AustregesiloCelso Augusto Guimarães SantosK. SchönningK. SchönningAram KotzinianYu.a. KhokhlovE.r. BielertV. DuicK. KondoN.s. RossiyskayaC. FrancoA. GrassoFabrice GautheronM. ChiossoK. KurekJ. Ter WolbeekO.yu. DenisovV. AndrieuxJan MatousekM. PesekR. BeckM. SluneckaF. HaasW.-d. NowakC. RiedlFederica SozziAdam SzabelskiS. SchopfererFrançois HerrmannA. NagaytsevF. BalestraR. BirsaD. NeyretM. KrämerV. AnosovE. BurtinJen-chieh PengS.s. DasguptaP. KremserM. BücheleJ.h. KoivuniemiLaura SilvaI. KonorovMarcin StolarskiK. BickerK. BickerYu.v. MikhailovTakahiro IwataJohannes BernhardJohannes BernhardA. GuskovAndrea Bressansubject
PhysicsQuantum chromodynamicsMeson010308 nuclear & particles physicsPartial wave analysisGeneral Physics and AstronomyParity (physics)Quantum number01 natural sciencesNuclear physicsPion0103 physical sciencesIsobarHigh Energy Physics::ExperimentNuclear Experiment010306 general physicsPseudovectordescription
The COMPASS Collaboration at CERN has measured diffractive dissociation of 190 GeV/c pions into the π(-)π(-)π(+) final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of 3π mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88 waves. A narrow peak is observed in the f0(980)π channel with spin, parity and C-parity quantum numbers J(PC)=1(++). We present a resonance-model study of a subset of the spin-density matrix selecting 3π states with J(PC)=2(++) and 4(++) decaying into ρ(770)π and with J(PC)=1(++) decaying into f0(980)π. We identify a new a1 meson with mass (1414(-13)(+15)) MeV/c2 and width (153(-23)(+8)) MeV/c2. Within the final states investigated in our analysis, we observe the new a1(1420) decaying only into f0(980)π, suggesting its exotic nature.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-08-19 | Physical Review Letters |