Form factor in K{sup +}{yields}{pi}{sup +}{pi}{sup 0}{gamma}: Interference versus direct emission

doi:10.1103/PHYSREVD.75.094014

Abstract

We analyze the effect of a form factor in the magnetic contribution to K{sup +}{yields}{pi}{sup +}{pi}{sup 0}{gamma}. We emphasize how this can show up experimentally; in particular, we try to explore the difference between a possible interference contribution and a form factor in the magnetic part. The form factor used for K{sup +}{yields}{pi}{sup +}{pi}{sup 0}{gamma} is analogous to the one for K{sub L}{yields}{pi}{sup +}{pi}{sup -}{gamma}, experimentally well established.

Experimental study of the rare K$sup +$ decay modes: K$sup +$ $Yields$ $pi$$sup +$$pi$$sup 0$$gamma$, K$sup +$ $Yields$ $mu$$sup +$$pi$$sup 0$$nu$$gamma$, K$sup +$ $Yields$ $pi$$sup +$$gamma$$gamma$, K$sup +$ $Yields$ $pi$$sup +$$nu$nu-bar, K$sup +$ $Yields$ $pi$$sup 0$$pi$$sup 0$e$sup +$$nu$, and K$sup +$ $Yields$ e$sup +$$pi$$sup 0$$nu$$gamma$

Ljung, D. ; Cline, D. September 1973 - Phys. Rev., D, v. 8, no. 5, pp. 1307-1330
A MEASUREMENT OF THE RATIOS OF THE RATES K$sup 0$/sub L/ $Yields$ 3$pi$$sup 0$/K$sup 0$/sub L/ $Yields$ $pi$$sup +$$pi$$sup -$$pi$$sup 0$, K$sup 0$/sub L/$Yields$ 3$pi$$sup 0$/K$sup 0$/sub L/ $Yields$ ALL CHARGED MODES AND K$sup 0$/sub L/ $Yields$ $pi$$mu$$nu$/K$sup 0$/sub L/ $Yields$ $pi$e$nu$, AND TESTS OF THE $delta$I = 1/2 RULE.

Budagov, I.A. ; Burmeister, H. ; Cundy, D.C. January 1968 - Nuovo Cim., 57A: 182-9(Sept. 1, 1968).
Experimental study of direct photon emission in K/it{sup -} {sup {yields}} {pi}{sup -}{pi}{sup 0}{gamma} decay using ISTRA+ detector

Uvarov, V. A. ; Akimenko, S. A. ; Bolotov, V. N. ; ... January 2006 - Physics of Atomic Nuclei

The branching ratio in the charged-pion-kinetic-energy region of 55 to 90 MeV for the direct photon emission in the K{sup -} {sup {yields}} {pi}{sup -}{pi}{sup 0}{gamma} decay has been measured using in-flight decays detected with the ISTRA+ setup operating in the 25-GeV/c negative secondary beam of the U-70 PS. The value Br(DE)=[0.37{+-}0.39(stat.){+-}0.10(syst.)]x10{sup -5} obtained from the analysis of 930 completely reconstructed events is consistent with the average value of two stopped-kaon experiments, but it differs by 2.5 standard deviations from the average value of three in-flight-kaon experiments. The result is also compared with recent theoretical predictions.
DOI: 10.1134/S1063778806010042
Field-theoretic calculation of the direct-emission amplitude in K$sup +-$ $Yields$ $pi$$sup +-$$pi$$sup 0$$gamma$

Dominguez, C.A. ; Zepeda, A. December 1973 - Phys. Rev., D, v. 8, no. 11, pp. 4203-4205

We show that to order eg/sup 2/G the direct-emission amplitude in the decay K/sup plus or minus / yields pi /sup plus or minus / pi /sup o/ gamma is logarithmically divergent. ( auth)
STUDY OF K$sub 1$$sup 0$ $Yields$ $pi$$sup 0$$pi$$sup 0$ AND K$sub 2$$sup 0$ $Yields$ $pi$$sup 0$$pi$$sup 0$ INTERFERENCE.

Gobbi, B. ; Green, D. ; Hakel, W. ; ... January 1969 - Phys. Rev. Lett., 22: 685-8(Mar. 31, 1969).

Title: Form factor in K{sup +}{yields}{pi}{sup +}{pi}{sup 0}{gamma}: Interference versus direct emission

Abstract

Citation Formats

Experimental study of direct photon emission in K/it{sup -} {sup {yields}} {pi}{sup -}{pi}{sup 0}{gamma} decay using ISTRA+ detector

Field-theoretic calculation of the direct-emission amplitude in K$sup +-$ $Yields$ $pi$$sup +-$$pi$$sup 0$$gamma$

STUDY OF K$sub 1$$sup 0$ $Yields$ $pi$$sup 0$$pi$$sup 0$ AND K$sub 2$$sup 0$ $Yields$ $pi$$sup 0$$pi$$sup 0$ INTERFERENCE.