Mikhail Bashkanov
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Transcript of Mikhail Bashkanov
Two-pion program at WASA
Mikhail BashkanovInvestigations of the Basic double-pionic fusion in the region of the ABC effect
Wasa-at-COSY1Content2Fusion3npnpgDouble-pionic fusion4npnpppggggDouble-pionic fusion5npnpppThe ABC-effect6npnpppHistory of the ABC effectLow mass enhancement in M
Alexander Abashian, Norman E. Booth Kenneth M. Crowe, Phys. Rev. Lett. 5, 258 (1960)
M.Bashkanov et. al, Phys. Lett. B637 (2006) 223-228
P. Adlarson et. al, Phys. Rev. C86 (2012) 032201P. Adlarson et. al, Phys. Rev. Lett. 106 (2011) 2423028
ABC resonance70 MeVTotal cross section pn d00 P. Adlarson et. al Phys. Rev. Lett. 106:242302, 2011NN*(1440)9
t-channel ABC effectM for different energies10
Angular distribution in the peak
J=1J=3Quantum numbers of the structureAntisymmetrization: Jp=1+or 3+ : if L=0
pn R d 00 pn d 00I=0,1I=0I=0,2I=01+3+
1+ excluded by ().3+ assigned 1112Status of Theoretical Descriptionpn R DD dp0p0
dpnI(Jp) = 0(3+)Isospin relations13I=0I=114Total cross section pN d P. Adlarson et. al Phys. Lett. B721 (2013) 229
15M in pN d
16M in pN d
17M in pN d
Open channel18pn pp-0
19ABC expectedPreliminaryConventional processConventional process +ABCElastic channel20213+ Resonance in pnnpL=2npL=4Kinematics
22Proton spectatorprotonneutrondpnp + psp23Total pn cross-section
SAIDDevlin et al, PRD8, 136 (73) LisowskI et al, PRL49, 255(82)24
Expectationspnnp
SAIDSAID with resonance
25Expectationpnnp
SAID
26Realitypnnp
SAID
27pn Vector Analysing power
SAIDVery PreliminaryConclusion28Thank youMultiplet1010=35282710**Y()=2I()=0Kim Maltman, Nucl. Phys. A501 (1989) 843Mirror dibaryon31DDI(Jp) = 0(3+)d*uuudddI(Jp) = 3(0+)DDuuuuuuMirror Multiplet1010=35282710***+***+**+**++++--33M in pN d
34M in pN d
35M in pN d