Measuring The Rare Decays $K^+\to π^+ ν\barν$ and $K^0_L \to π^0 ν\barν$
| dc.creator | Diwan, Milind V | |
| dc.date | 2002-05-28 | |
| dc.date.accessioned | 2026-07-07T03:35:14Z | |
| dc.date.available | 2026-07-07T03:35:14Z | |
| dc.description | In this paper I will describe the search for rare kaon decay processes $K^+\to π^+ ν\barν$ and $K^0_L \to π^0 ν\barν$. The small decay rate for these processes is considered a key prediction of the standard model. We searched for the charged kaon decay $K^+\to π^+ ν\barν$ using kaons decaying at rest in the E787 detector at Brookhaven National Laboratory in two different phase space regions: Region 1 with pion momentum above 205 MeV/c (the $K^+ \to π^+ π^0$ peak) and Region 2 with pion momentum below 205 MeV/c. We have found 2 events in Region 1 which is known to have small background ($0.15^{+0.048}_{-0.032}$). This observation leads to a branching ratio measurement of $(1.57^{+1.75}_{-0.82})\times 10^{-10}$. We found 1 event in Region 2 with an expectation of $0.73\pm 0.18$ background events. The observation from Region 2 is consistent with the branching ratio measured using Region 1. I will also describe new efforts underway to measure both the decay rates with much higher statistics. | |
| dc.description | 23 pages 8 figures Talk given at Les Rencontres de Physique, La Thuile, Aosta Valley (Italy), March 3-9, 2002 | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0205089 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0205089 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/37272 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measuring The Rare Decays $K^+\to π^+ ν\barν$ and $K^0_L \to π^0 ν\barν$ | |
| dc.type | text |