2 edition of **Measurement of the neutral pion form factor slope from the Dalitz pair spectrum.** found in the catalog.

Measurement of the neutral pion form factor slope from the Dalitz pair spectrum.

Joseph Burger

- 168 Want to read
- 2 Currently reading

Published
**1972**
by Nevis Laboratories in Irvington-on-Hudson, N.Y
.

Written in English

- Pions -- Scattering.,
- Form factor (Nuclear physics)

**Edition Notes**

Contributions | Nevis Laboratories. |

Classifications | |
---|---|

LC Classifications | QC794 .B84 |

The Physical Object | |

Pagination | 133 p. |

Number of Pages | 133 |

ID Numbers | |

Open Library | OL5468496M |

LC Control Number | 73171462 |

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The negative pion (??) is an unstable particle with an average lifetime of ×10?8s (measured in the rest frame of the pion). A) If the pion is made to travel at very high speed relative to a laboratory, its average lifetime is measured in the laboratory to be ×10?7s. The probability of measurement L z 0 is 1 2 The alternative way In V p39 of the. The probability of measurement l z 0 is 1 2 the School University of Illinois, Urbana Champaign; Course Title PHYSICS ; Type. Homework Help. Uploaded By bfreaf. Pages 8 Ratings % (1) 1 out of 1 people found.

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Current algebra and PCAC predict A → = 0 – Sutherland, Veltman, Analysis of the axial anomaly solves problem – Adler, Bell and Jackiw, Bardeen, Chiral perturbation theory Theory p k1 k2 () eV F N m 3 2 2 3 c 2 0 = π α Γπ→γγ= π π.

Measurement of the pion form factor for M_{pipi}^2 between and GeV^2 with the KLOE detector by Stefan E. Müller. Precise Measurement of the Pion Axial Form Factor in the π + → e + ν γ Decay Article (PDF Available) in Physical Review Letters 93(18).

PDF | We complement studies of the neutral pion transition form factor pi^0 --> gamma^(*) gamma^(*) with calculations for the electromagnetic decay | Find, read and cite. Volumenumber 5,6 PHYSICS LETTERS 26 April MEASUREMENT OF THE PION FORM FACTOR IN THE TIME-LIKE REGION FOR q2 VALUES BETWEEN (GeV/c)2 AND (GeV/c)2 S.R.

AMENDOLIA B. BADELEK G. BATIGNANI f, G.A. BECK e, E.H. BELLAMY g, E. BERTOLUCCI D. BETTONI H. BILOKON e, A. BIZZETI G. BOLOGNA e, L. BOSISIO C. Cited by: We present a new determination of the parity of the neutral pion via the double Dalitz decay {pi}{sup 0} {yields} e{sup +}e{sup -}e{sup +}e{sup -}.

Our sample, which consists of 30 candidate decays, was collected from K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{pi}{sup 0} decays in flight at the KTeV-E experiment at Fermi National. The neutral pion radiative width has been measured to eV ± % + % - % (lifetime = ± + - x s) utilizing the Primakoff effect and roughly to GeV photons at the Thomas Jefferson National Accelerator Facility in Newport News, VA.

The Hall B Photon Tagger, the Hall B Pair. is used to correct the spectrum. Results Using Eq. (1) and Eq. (2), one obtains the two-pion cross section ˙ˇˇ. The squared modulus of the pion form factor jFˇj2 can then be derived using the relation1) jFˇ(s0)j2 = 3 ˇ s0 2 em 3 ˇ ˙ˇˇ(s 0) ; (3) where s0 = (M0 ˇˇ) 2 is the squared momentum trans-ferred by the virtual photon and.

We consider an alternative explanation of newly found growth of neutral pion transition form factor with high virtuality of one of photons.

It is based on Sudakov suppression of quark-photon vertex. Some applications to scattering and annihilation channels are considered including the relevant experiments with lepton-proton by: 5.

The KLOE experiment has used the radiative return to determine the pion form factor between - GeV2: • In the overlap-region GeV2, the result is in very good agreement with the previous KLOE result (KLOE08, PLB () ) • Reasonable agreement with results from CMD-2 and SND data (especially at low M 2).

The form factor is fitted by a pole form with a pion radius of (r2 >1/2 = +- fm. The interaction of a charged pion with a photon of four-momentum q is modified from a point interac- tion by the form factor F(q2). At q2 = 0 the slope dF/dq2 Cited by: Using a consistency condition for the transverse part of the primitive AAV-vertex function, we derive the electromagnetic form factor of the pion from partially unitarized hard-pion current algebra and the Schnitzer-Weinberg parametrization (δ-model).

The result is in very good agreement with the Orsay measurements and in good enough agreement with the scarce data Cited by: 4. Comments: 14 pages, 5 figures. Combined proceedings of talks by J. Bulava and B.

Hoerz at the 33rd International Symposium on Lattice Field Theory (Kobe, Japan)Cited by: 7. As a first step, we calculate the spectrum of vector and axial-vector mesons in the KS model.

We numerically compute various coupling constants of the mesons and pions. Our analysis indicates that vector meson dominance is realized in this model. The pion, vector meson and axial-vector meson form factors are obtained and studied in by: Lattice techniques for extracting Fπ(Q2) zForm factor definition zUse the sequential-sink method: zDisadvantage: momentum p f and pion quantum numbers are fixed at the sink zAdvantages: variety of form-factors, e.g.

ρ!γπcomputable from same set of propagators zLargest Q2 available in Breit frame (p f = -p i).Need sequential propagators for several p f.

zFπ(Q2) extracted either. measurement of the electric form factor of the neutron at q 2 = – (gev/c) 2. neutron electric form factor via recoil polarimetry. madey, a. semenov, s. taylor, a. aghalaryan, virtual compton scattering and neutral pion electro-production from the proton in the nucleon resonance region.

As a first application, let us determine the spin and parity of the neutral pion. The decay already excludes = 1 by virtue of the Landau–Yang theorem.

We consider = 0 as the simplest possibility and prove that the angle between the polarizations remains constant as a function of time by constructing the 2 γ wave function directly from ().

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Pion spectrum using improved staggered fermions Taegil Bae parameter value b (quenched QCD, Wilson plaquette action) 1) a GeV geometry * 64 # of confs gauge xing Coulomb bare quark mass,Zm 2 + 5 Table 1: Simulation parameters for unimproved staggered fermions where A.

is a cubic vector, 0 Cited by: 3. The nomenclature used in particle physics is explained. The discoveries and properties of known elementary particles and resonances are given.

The particles considered are positrons, muon, pions, anti-protons, strange particles, neutrino and hadrons. An unstable particle called the pion has a mean lifetime of 25 ns in its own rest frame. A beam of pions travels through the laboratory at a speed of c.

(a) What is the mean lifetime of the pions as measured in the laboratory frame? (b) How far does a pion travel (as measured by laboratory observers) during this time?The negative pion (π-) is an unstable particle with an average lifetime of x s (measured in the rest frame of the pion).

(a) If the pion is made to travel at very high speed relative to a laboratory, its average lifetime is measured in the laboratory to be x s. Calculate the speed of the pion expressed as a fraction of c.5/5(1).9 minutes ago Write an equation in standard form of the parabola that has the same shape as the graph of f(x)=6x or g(x) = -6x, but with the given maximum or minimu rMaximum = 1 at x= -6h(x)=__ 11 minutes ago Explain how to use properties to prove d .