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Search Results: 1 - 10 of 401432 matches for " M. Korolija "
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Model independent extraction of the pole and Breit-Wigner resonance parameters
Ceci, S.;Korolija, M.;Zauner, B.
High Energy Physics - Phenomenology , 2013,
Abstract: We show that a slightly modified Breit-Wigner formula can successfully describe the total cross section even for the broad resonances, from light rho(770) to the heavy Z boson. In addition to mass, width, and branching fraction, we include another resonance parameter that turns out to be directly related to the pole residue phase. The new formula has two mathematically equivalent forms: one with the pole, and the other with the Breit-Wigner parameters.
Sciences education for connecting science, technology and the society
Korolija Jasminka,Stani?i? Jelena
Zbornik Instituta za Pedago?ka Istra?ivanja , 2009, DOI: 10.2298/zipi0902461k
Abstract: Connecting science, technology and the society is one of the important principles of contemporary education. The foundation of this principle is the idea that scientific and technological achievements should be useful and applicable in everyday life of an individual. The paper presents the main determinants of the STS project (Science, Technology and Society Project) which deals with studying the influence of scientific research and technological development on social, political and cultural values. The basic goal of education within the STS Project is to enable the students to understand and learn to incorporate the achievements of scientific and technological development in their own cultural, ecological, economic, political and social contexts. In addition to this, the paper presents the role of sciences in connecting science, technology and the society and describes the possibilities of incorporating a similar project in chemistry instruction in our school. Pilot study which was conducted refers to the proposal for applying the principles on which the STS project is based in chemistry instruction in our country. This pilot study can present the basis for future research and the guideline that can be used for promoting the process of education in primary and secondary school.
Suture granuloma of the abdominal wall with intra-abdominal extension 12 years after open appendectomy
Goran Augustin, Dragan Korolija, Mate Skegro, Jasminka Jakic-Razumovic
World Journal of Gastroenterology , 2009,
Abstract: Most complications after appendectomy occur within ten days; however, we report the unusual case of a suture granuloma 12 years after open appendectomy. The afebrile 75-year-old woman presented with a slightly painful palpable mass in the right lower abdomen. There was no nausea or vomiting and bowel movements were normal. She lost 10 kg during the 3 mo before presentation. The patient had undergone an appendectomy 12 years previously. Physical examination revealed a tender mass, 10 cm in diameter, under the appendectomy scar. The preoperative laboratory findings, tumor markers and plain abdominal radiographs were normal. Multi-slice computed tomography scanning showed an inhomogenous abdominal mass with minimal vascularization in the right lower abdomen 8.6 cm × 8 cm × 9 cm in size which communicated with the abdominal wall. The abdominal wall was thickened, weak and bulging. The abdominal wall mass did not communicate with the cecum or the ascending colon. Complete excision of the abdominal wall mass was performed via median laparotomy. Histopathological examination revealed a granuloma with a central abscess. This case report demonstrates that a preoperative diagnosis of abdominal wall mass after open appendectomy warrants the use of a wide spectrum of diagnostic modalities and consequently different treatment options.
New results in rare allowed muon and pion decays
D. Pocanic,E. Munyangabe,M. Bychkov,V. A. Baranov,W. Bertl,Yu. M. Bystritsky,E. Frlez,V. A. Kalinnikov,N. V. Khomutov,A. S. Korenchenko,S. M. Korenchenko,M. Korolija,T. Kozlowski,N. P. Kravchuk,N. A. Kuchinsky,M. C. Lehman,D. Mekterovic,D. Mzhavia,A. Palladino,P. Robmann,A. M. Rozhdestvensky,I. Supek,P. Truoel,Z. Tsamalaidze,A. van der Schaaf,B. Vandevender,E. P. Velicheva,V. P. Volnykh
Physics , 2014, DOI: 10.1142/S2010194514604372
Abstract: Simple dynamics, few available decay channels, and highly controlled radiative and loop corrections, make pion and muon decays a sensitive means of exploring details of the underlying symmetries. We review the current status of the rare decays: pi+ -> e+ nu, pi+ -> e+ nu gamma, pi+ -> pi0 e+ nu, and mu+ -> e+ nu nu-bar gamma. For the latter we report new preliminary values for the branching ratio B(E_gamma >10 MeV, theta_(e-gamma) > 30deg) = 4.365 (9)_stat (42)_syst x 10^{-3}, and the decay parameter eta-bar = 0.006 (17)_stat (18)_syst, both in excellent agreement with standard model predictions. We review recent measurements, particularly by the PIBETA and PEN experiments, and near-term prospects for improvement. These and other similar precise low energy studies complement modern collider results materially.
New studies of allowed pion and muon decays
D. Pocanic,A. Palladino,L. P. Alonzi,V. A. Baranov,W. Bertl,M. Bychkov,Yu. M. Bystritsky,E. Frlez,V. A. Kalinnikov,N. V. Khomutov,A. S. Korenchenko,S. M. Korenchenko,M. Korolija,T. Kozlowski,N. P. Kravchuk,N. A. Kuchinsky,M. C. Lehman,D. Mekterovic,E. Munyangabe,D. Mzhavia,P. Robmann,A. M. Rozhdestvensky,S. N. Shkarovskiy,U. Straumann,I. Supek,P. Tru?l,Z. Tsamalaidze,A. van der Schaaf,E. P. Velicheva,V. P. Volnykh
Physics , 2012, DOI: 10.1063/1.4826735
Abstract: Building on the rare pion and muon decay results of the PIBETA experiment, the PEN collaboration has undertaken a precise measurement of B_{\pi e2} = R^\pi_{e/\mu}, the \pi^+ -> e^+\nu(\gamma) decay branching ratio, at the Paul Scherrer Institute, to reduce the present 40\times experimental precision lag behind theory to ~ 6-7\times. Because of large helicity suppression, R^\pi_{e/\mu} is uniquely sensitive to contributions from non-(V-A) physics, making this decay a particularly suitable subject of study. Even at current precision, the experimental value of B_{\pi e2} provides the most accurate test of lepton universality available. During runs in 2008-10, PEN has accumulated over 2\times 10^7 \pi_{e2} events; a comprehensive maximum-likelihood analysis is currently under way. The new data will also lead to improved precision of the earlier PIBETA results on radiative \pi and \mu decays.
New Precise Measurement of the Pion Weak Form Factors in the Pi+ -> e+ nu gamma Decay
M. Bychkov,D. Po?ani?,B. A. VanDevender,V. A. Baranov,W. Bertl,Yu. M. Bystritsky,E. Frle?,V. A. Kalinnikov,N. V. Khomutov,A. S. Korenchenko,S. M. Korenchenko,M. Korolija,T. Kozlowski,N. P. Kravchuk,N. A. Kuchinsky,W. Li,D. Mekterovi?,D. Mzhavia,S. Ritt,P. Robmann,O. A. Rondon-Aramayo,A. M. Rozhdestvensky,T. Sakhelashvili,S. Scheu,U. Straumann,I. Supek,Z. Tsamalaidze,A. van der Schaaf,E. P. Velicheva,V. P. Volnykh,Y. Wang,H. -P. Wirtz
Physics , 2008, DOI: 10.1103/PhysRevLett.103.051802
Abstract: We have measured the $\pi^+\to {\rm e}^+\nu\gamma$ branching ratio over a wide region of phase space, based on a total of 65,460 events acquired using the PIBETA detector. Minimum-$\chi^2$ fits to the measured $(E_{e^+},E_\gamma)$ energy distributions result in the weak form factor value of $F_A=0.0119(1)$ with a fixed value of $F_V=0.0259$. An unconstrained fit yields $F_V=0.0258(17)$ and $F_A=0.0117(17)$. In addition, we have measured $a=0.10(6)$ for the dependence of $F_V$ on $q^2$, the ${\rm e}^{+}\nu$ pair invariant mass squared, parametrized as $F_V(q^2)=F_V(0)(1+a\cdot q^2)$. The branching ratio for the kinematic region $E_\gamma > 10 $MeV and $\theta_{{\rm e^+}\gamma} > 40^\circ $ is measured to be $B^{\rm exp}=73.86(54) \times 10^{-8}$. Earlier deviations we reported in the high-$E_\gamma$/low-$E_{{\rm e}^+}$ kinematic region are resolved, and we find full compatibility with CVC and standard $V$$-$$A$ calculations without a tensor term. We also derive new values for the pion polarizability, $\alpha_E = \rm 2.78(10) \times 10^{-4} fm^3$, and neutral pion lifetime, $\tau_{\pi 0} = (8.5 \pm 1.1) \times 10^{-17} $s.
Precise Measurement of pi+ -> e+ nu Branching Ratio
E. Frle?,L. P. Alonzi,V. A. Baranov,W. Bertl,M. Bychkov,Yu. M. Bystritsky,N. V. Khomutov,A. S. Korenchenko,S. M. Korenchenko,M. Korolija,T. Kozlowski,N. P. Kravchuk,N. A. Kuchinsky,D. Mekterovi?,D. Mzhavia,A. Palladino,D. Po?ani?,P. Robmann,A. M. Rozhdestvensky,V. V. Sidorkin,U. Straumann,I. Supek,P. Tru?l,A. van der Schaaf,E. P. Velicheva,V. P. Volnykh
Physics , 2008, DOI: 10.1007/978-90-481-2287-5_10
Abstract: The PEN Collaboration is conducting a new measurement of the pi+ -> e+ nu branching ratio at the Paul Scherrer Institute, with the goal uncertainty of delta B/B(pie2)=5E-4 or lower. At present, the combined accuracy of all published pie2 decay measurements lags behind the theoretical calculation by a factor of 40. In this contribution we report on the PEN detector configuration and its performance during two development runs done in 2007 and 2008.
PEN experiment: a precise measurement of the pi+ -> e+ nu decay branching fraction
PEN Collaboration,D. Pocanic,L. P. Alonzi,V. A. Baranov,W. Bertl,M. Bychkov,Yu. M. Bystritsky,E. Frlez,V. A. Kalinnikov,N. V. Khomutov,A. S. Korenchenko,S. M. Korenchenko,M. Korolija,T. Kozlowski,N. P. Kravchuk,N. A. Kuchinsky,D. Mekterovic,D. Mzhavia,A. Palladino,P. Robmann,A. M. Rozhdestvensky,S. N. Shkarovskiy,U. Straumann,I. Supek,P. Truoel,Z. Tsamalaidze,A. van der Schaaf,E. P. Velicheva,V. P. Volnykh
Physics , 2009, DOI: 10.1063/1.3293904
Abstract: A new measurement of $B_{\pi e2}$, the $\pi^+ \to e^+\nu(\gamma)$ decay branching ratio, is currently under way at the Paul Scherrer Institute. The present experimental result on $B_{\pi e2}$ constitutes the most accurate test of lepton universality available. The accuracy, however, still lags behind the theoretical precision by over an order of magnitude. Because of the large helicity suppression of the $\pi_{e2}$ decay, its branching ratio is susceptible to significant contributions from new physics, making this decay a particularly suitable subject of study.
PEN: a sensitive search for non-(V-A) weak processes
PEN Collaboration,D. Pocanic,L. P. Alonzi,V. A. Baranov,W. Bertl,M. Bychkov,Yu. M. Bystritsky,E. Frlez,V. A. Kalinnikov,N. V. Khomutov,A. S. Korenchenko,S. M. Korenchenko,M. Korolija,T. Kozlowski,N. P. Kravchuk,N. A. Kuchinsky,D. Mekterovic,D. Mzhavia,A. Palladino,P. Robmann,A. M. Rozhdestvensky,S. N. Shkarovskiy,U. Straumann,I. Supek,P. Truoel,Z. Tsamalaidze,A. van der Schaaf,E. P. Velicheva,V. P. Volnykh
Physics , 2009,
Abstract: A new measurement of $B_{\pi e2}$, the $\pi^+ \to e^+\nu(\gamma)$ decay branching ratio, is currently under way at the Paul Scherrer Institute. The present experimental result on $B_{\pi e2}$ constitutes the most accurate test of lepton universality available. The accuracy, however, still lags behind the theoretical precision by over an order of magnitude. Thanks to the large helicity suppression of $\pi_{e2}$ decay, the branching ratio is susceptible to significant contributions from new physics, making this decay a particularly suitable subject of study.
Azimuthal dependence of collective expansion for symmetric heavy ion collisions
G. Stoicea,M. Petrovici,A. Andronic,N. Herrmann,J. P. Alard,Z. Basrak,V. Barret,N. Bastid,R. Caplar,P. Crochet,P. Dupieux,M. Dzelalija,Z. Fodor,O. Hartmann,K. D. Hildenbrand,B. Hong,J. Kecskemeti,Y. J. Kim,M. Kirejczyk,M. Korolija,R. Kotte,T. Kress,A. Lebedev,Y. Leifels,X. Lopez,M. Merschmeier,W. Neubert,D. Pelte,F. Ramires,W. Reisdorf,D. Schull,Z. Seres,B. Sikora,K. S. Sim,V. Simion,K. Siwek-Wilczynska,V. Smolyankin,M. Stockmeier,K. Wisniewski,D. Wohlfarth,I. Yushmanov,A. Zhilin,P. Danielewicz
Physics , 2004, DOI: 10.1103/PhysRevLett.92.072303
Abstract: Detailed studies of the azimuthal dependence of the mean fragment and flow energies in the Au+Au and Xe+CsI systems are reported as a function of incident energy and centrality. Comparisons between data and model calculations show that the flow energy values along different azimuthal directions could be viewed as snapshots of the fireball expansion with different exposure times. For the same number of participating nucleons more transversally elongated participant shapes from the heavier system produce less collective transverse energy. Good agreement with BUU calculations is obtained for a soft nuclear equation of state.
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