- Full text PDF available (11)
We present the final report from a series of precision measurements of the muon anomalous magnetic moment, a µ = (g − 2)/2. The details of the experimental method, apparatus, data taking, and analysis are summarized. Data obtained at Brookhaven National Laboratory, using nearly equal samples of positive and negative muons, were used to deduce a µ (Expt) =… (More)
The muon (g − 2) value has played an important role in constraining physics beyond the standard model. We propose to develop an improved Muon (g −2) experiment at J-PARC with the design goal of an improvement of a factor of 5 to 10 over E821 at Brookhaven, (relative uncertainty 0.1 to 0.06 parts per million). At this proposed level of precision a robust… (More)
A precise measurement of the anomalous g value, a(mu) = (g-2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron. The result a(mu+) = 11 659 202(14) (6) x 10(-10) (1.3 ppm) is in good agreement with previous measurements and has an error one third that of the combined previous data. The current theoretical value from… (More)
b The muon (g−2) experiment at Brookhaven National Laboratory has measured the anomalous magnetic moment of the positive muon with a precision of 0.7 ppm. This paper presents that result, concentrating on some of the important experimental issues that arise in extracting the anomalous precession frequency from the data. The spin of the muon generates a… (More)
We present a measurement of the pion form factor based on e + e − annihilation data from the CMD-2 detector, in the energy range 0.6 < √ s < 1.0 GeV with a systematic precision of 0.8%. It is based on a data set which is five times larger than that used in our previous measurement.
The muon (g?2) experiment at Brookhaven has just completed a 3-month run for checkout and initial data-taking. In the rst two months beam was taken in a parasitic mode where one out of ten AGS pulses was delivered for commissioning of the beam line, quadrupoles, detectors, and data acquisition. This was followed by four weeks of dedicated data collection.… (More)
A higher precision measurement of the anomalous g value, a(mu)=(g-2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron, based on data collected in the year 2000. The result a(mu(+))=11 659 204(7)(5)x10(-10) (0.7 ppm) is in good agreement with previous measurements and has an error about one-half that of the combined… (More)
We present a measurement of the pion form factor based on e + e − annihilation data from the CMD-2 detector in the energy range 0.6 < √ s < 1.0 GeV with a systematic uncertainty of 0.8%. A data sample is five times larger than that used in our previous measurement.
The status of the muon (g − 2) experiment at the Brookhaven AGS is reviewed. An accuracy of 1.3 ppm on the µ + anomalous magnetic moment has been achieved and published. This result differs with the standard model prediction by about 2.5 standard deviations. A data sample with approximately seven times as much data is being analyzed, with a result expected… (More)
The performance of a scintillating ber (2mm diameter) position sensitive detector (4:8 4:8 cm 2 active area) for the single bremstrahlung luminosity monitor (LMPSD) at the VEPP-2M electron-positron collider at the Budker Institute of Nuclear Physics in Novosibirsk, Russia is described. Custom electronics is triggered by coincident hits in the X and Y planes… (More)