Now showing items 1-20 of 5026

    • Value of the ξ parameter in Kl3 decay from the pion-gauge condition 

      Aydın, Zeki Zekeriya (1972)
      It is shown with the help of the pion-gauge condition that the divergence of the most general boson current in K l 3 decay vanishes in the limit of zero four-momentum of the pion. This in turn implies ξ = − 1 ...
    • Kl3 and πe3 decays in terms of the Kemmer β current 

      Aydın, Zeki Zekeriya (1973)
      It is shown with the help of the pion-gauge condition that the divergence of the most general boson current in K l 3 decay vanishes in the limit of zero four-momentum of the pion. This in turn implies ξ = − 1 ...
    • Relativistic composite systems and minimal coupling 

      Duru, İsamil Hakkı (1974)
      The problem of minimal coupling of relativistic composite systems having internal degrees of freedom is investigated. The ambiguity in the introduction of various internal coordinates with the same mass spectrum can be ...
    • Space motions of galactic G- and K-type stars 

      Aslan, S (1977)
      Spectra of 912 G- and K -type stars in six galactic directions (⁠lII=90∘,bII=±20∘;lII=180∘,bII=±20∘;lII=90∘,bII=+45∘;bII=+90∘⁠) have been secured. The relevant space motions of the stars, subdivided into distance groups ...
    • Internal structure of composite systems described by infinite-component wave equations 

      Duru, İsmail Hakkı (1977)
      It is shown that the boson representation of infinite-component SO(4,2) wave equations represents a system of four oscillators as well as three-dimensional Kepler dynamics. These two pictures are complementary to each ...
    • On the K-term and dispersion ratios of semi-regular variables 

      Aslan, Zeki (1981)
      Optical velocities of semi-regular (SR) and irregular (Lb) variables are analysed for a K-term. There is evidence for a dependence upon stellar period. Absorption lines in shorter period non-emission SR variables are ...
    • Upper limit on the magnetic moment of the neutrino 

      Aydın, Zeki Zekeriya; Duru, İsmail Hakkı (1982)
      We have recalculated the processes e ν → e ν and e + e − → ν ¯ ν due to an assumed magnetic moment κ of the neutrino (correcting some errors in the previous calculations). Comparing the results with ...
    • Neutrino and antineutrino elastic scattering and photoneutrino reactions 

      Aydın, Zeki Zekeriya (1983)
      The processes ν ν → ν ν , ν ¯ ν → ν ¯ ν , ν ¯ ν → 2 γ , and ν γ → ν γ , which are of astrophysical interest, are calculated both in the electroweak model and in the magnetic model when the ...
    • Euler-form actions and the vanishing of the cosmological constant 

      Dereli, T (1989)
      We investigate the conditions of the vanishing cosmological constant and the presence of gravity and vector gauge fields in a D -dimensional non-Abelian Kaluza-Klein theory based on a dimensionally continued ...
    • A physical realisation of the super-sine algebra 

      Verçin, Abdullah (1992)
      An explicit physical realisation of the supersymmetric extension of the sine algebra generated by the symmetries of a spinless Bloch electron in a constant uniform magnetic field is given in terms of the symmetry operators ...
    • Two anyons with Coulomb interaction in a magnetic field 

      Verçin, Abdullah (1992)
      We have computed numerically the energy spectrum of two anyons with Coulomb (1/r) interaction in a uniform magnetic field. Both non-singular and singular energy eigenfunctions are considered. We solve a second order ...
    • Light-curve and period changes of AB-Andromedae 

      Selam, Selim; Derman, Ethem; Müyesseroğlu, Zekeriya; Akalın, Aynur; Demircan, Osman (1994)
      New photoelectric observations of AB And obtained between 1989 and 1992 have been used, together with all available light curves from the literature, to study the light-curve variation of the system and its probable ...
    • Scalar leptoquark production at TeV energy γp colliders 

      Çelikel, Ayşegül Soydan; Atağ, Satılmış (1994)
      Single scalar leptoquark production in the collisions of high energy γ and proton beams has been investigated. It is shown that future γp colliders will be sensitive to scalar leptoquark masses up to few
    • Light-curve and period changes of AB Andromedae 

      Derman, Ethem; Akalın, A; Selam, Salim O; Müyesseroğlu, Zekeriya; Demirçan, Osman (1994)
      New photoelectric observations of AB And obtained between 1989 and 1992 have been used, together with all available light curves from the literature, to study the light-curve variation of the system and its probable ...
    • Pair production of scalar leptoquarks at TeV energy γp colliders 

      Çakır, Orhan; Ata, S (1994)
      Scalar leptoquark pair production in high energy γ -proton collisions is investigated. We show that future TeV energy γ p colliders are convenient places for searching for scalar leptoquarks up to the masses of a few TeV.
    • A search for the fourth SM family 

      Çelikel, A; Çiftçi, Abbas K; Sultansoy, Saleh F (1995)
      Arguments favouring the existence of a fourth fermion family in the framework of the Standard Model are given. The masses of the fourth family neutrino, charged lepton and down quark are close to each other within an ...
    • Compensation of lepton charge of matter with relic anti-sneutrinos 

      Çiftçi, Abbas K; Sultansoy, Saleh F; Tütköz, Shemsettin (1995)
      We reconsider the idea of the leptonic photon by taking into account the possible compensation of the lepton charge of matter with relic anti-sneutrinos. As a consequence of this compensation we have shown that the available ...
    • Pair production of squarks in TeV scale polarized γp collisions 

      Kandemir, Ayfer; Yılmazer, Ali Ulvi (1996)
      The production of squarks in the high energy collisions of the real photons off the protons is discussed. The polarizations of both photon and proton beams are considered. Although the cross sections for different initial ...