[Clascomment] OPT-IN: Subthreshold photoproduction of phi mesons from deuterium

[Keith Griffioen]

There are a number of little problems with the editing of this paper that need to be fixed before submission:


\"for calibration purposes.\"  

\"would increase the acceptance, which is limited by the K- for the K+K-p triple coincidence.\"

\"on the other hand, a slightly less upstream position of the target would decrease the acceptance\"

\"near-threshold cross section for $\\phi$-meson production\"

\"FIG 1.  ... \"The y-axis is in units of events per 2.5 MeV.\"

Eq. 1  \" for x > 2M_K\"   [with no parentheses]

\"such a fit was\"

\"in order to estimate the systematic\"

\"were carried out to model detector inefficiencies and resolutions for this reaction channel.\"

\"energy distribution of the data\"

\"The initial momentum of the nucleon inside the deuteron was chosen using the Bonn potential wavefunction.\"

\"The spectator neutron was assumed to be on-shell, whereas the struck proton was assumed to be off-shell before absorbing a photon.\"

\"with a full width at half maximum of\"

\"differential photoproduction cross section\"

FIG 2. \"Missing momentum distributions for data...\"

\"final-state interactions\"  or FSIs if you define this somewhere.

\" with respect to t=(P_phi - P_gamma)^2 and t_0 ...\"

\"Although n=4 was used...\"

\"FSIs were obtained,\"

\"comparison of the missing momentum distribution for the data (solid triangles) and the MC (solid circles).\"

\"MC-generated\"

\"reconstructed using the same algorithm as was used for the data.\"

[how did you do bin-centering corrections?  Using the MC?]

\"overall systematic uncertainty in the differential cross section\"

\"mass cut were 4.2\"

\"The angular distribution of the phi-meson\'s decay products in its rest frame and ...\"



\"were uncertain\"

\"FSIs\"

\"The systematic errors vary\"

\"The absolute size of the bin-centering corrections were between 1 and 10%\"

\"Combined in quadrature, the overall systematic errors...\"

\"The phi-meson photoproduction cross sections for the deuteron are tabulated...\"

\"whereas the solid square\"

\"is based on\"

\"differential photoproduction cross section\"

\"is the same as for\"

\"for phi-production\"

\"cross section for phi-meson photoproduction\"

\"below the production threshold for the proton.\"

\"the chosen incident photon energy range ... is near the 1.57 GeV...\"

\"Although heavier\"