Precision Determination of the Muon g μ − 2 and ᾱ Q . E . D . ( M 2 Z ) ∗

نویسنده

  • F. J. Ynduráin
چکیده

We present a summary of the results of two recent precise calculations of the muon anomalous magnetic moment and the electromagnetic coupling on the Z.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Measurement of muon capture on the proton to 1% precision and determination of the pseudoscalar coupling gP.

The MuCap experiment at the Paul Scherrer Institute has measured the rate Λ(S) of muon capture from the singlet state of the muonic hydrogen atom to a precision of 1%. A muon beam was stopped in a time projection chamber filled with 10-bar, ultrapure hydrogen gas. Cylindrical wire chambers and a segmented scintillator barrel detected electrons from muon decay. Λ(S) is determined from the differ...

متن کامل

Testable (g − 2)μ contribution due to a light stabilized radion in the Randall-Sundrum model

In this paper we calculate the (g − 2)μ contribution due to a light stabilized radion using the radion couplings both to the kinetic energy and the mass term of the muon. We find that the (g − 2)μ contribution due to radion diverges logarithmically with the cut off. We then show that the bound from precision EW data on radion phenomenology allows a sizable shift in the radion mediated muon anom...

متن کامل

NEW R VALUES IN 2-5 GeV FROM THE BEIJING SPECTROMETER

The QED running coupling constant evaluated at the Z pole, α(M2 Z), and the anomalous magnetic moment of the muon, aμ = (g − 2)/2, are two fundamental quantities that are used to test the Standard Model (SM) 1. The dominant uncertainties in both α(M2 Z) and a SM μ are due to the effects of hadronic vacuum polarization, which cannot be reliably calculated. Instead, with the application of disper...

متن کامل

On the relation between QCD potentials in momentum and position space

We derive a formula which relates the QCD potentials in momentum space and in position space in terms of the β function of the renormalization-group equation for the potential. This formula is used to study the theoretical uncertainties in the potential and in particular in its application to the determination of the pole mass mb when we use perturbative expansions. We demonstrate the existence...

متن کامل

Improved measurement of the positive-muon lifetime and determination of the Fermi constant.

The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, tau(micro)=2.197 013(24) micros, is in excellent agreement with the previous world average. The new world average tau(micro)=2.197 019(21) micros determines the Fermi constant G(F)...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2001