MAID Transverse Polarization Observables

Transverse Polarization Observables

in standard photoproduction notation

16 polarization observables, for definition see e.g.
L.S. Barker, A. Donnachie, J.K. Storrow, Nucl. Phys. B 95 (1975) 347 or
G. Knoechlein, D. Drechsel, L. Tiator, Z. Phys. A 352 (1995) 327-343

ds/dW, T, P, S, E, F, G, H, C_x', C_z', O_x', O_z', T_x', T_z', L_x', L_z'

Channel: K⁺L K⁰L K⁺S⁰ K⁰S⁺ K⁺S^- K⁰S⁰

Choose groups of observables:	ds/dW , T, P, S, E, F, G, H
	C_x', C_z', O_x', O_z', T_x', T_z', L_x', L_z'

Model input (on and off): Born K* (893)K₁(1270)
Resonances in KL:S₁₁(1650)P₁₁(1710) P₁₃(1720) D₁₃(1900) (missing resonance)
Resonances in KS:S₁₁(1650)P₁₁(1710) P₁₃(1720) S₃₁(1900) P₃₁(1910)

Change values of Born couplings, relative to standard values: g_KLN = -13.47, g_KSN = 4.25 (no factors of 4p):

g_KLN	g_KSN

Change values of vector meson couplings G_V,T = g_gKK* g^V,T_K*YN(relative to standard values):

K* (893)		K₁(1270)
G_V	G_T	G_V	G_T

Change values of resonance couplings G_1,2,3= g^1,2,3_gNN* g_KYN(relative to standard values):

KL and KS
S₁₁(1650)		P₁₁(1710)		P₁₃(1720)
G₁	G₃	G₁	G₃	G₁	G₂	G₃

KL only			KS only
D₁₃(1900)			S₃₁(1900)		P₃₁(1910)
G₁	G₂	G₃	G₁	G₃	G₁	G₃

Choose kinematical variables

choose an independent (running) variable: Q² W Q_K

choose values for Q², W, Q_K, step size and maximum value:

Q² (GeV/c)² W (MeV) Q_K (deg) increment upper value

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