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Wyświetlanie 1-10 z 36
Tytuł:
Precision measurements of the $e^{+}e^{-} \rightarrow \pi ^{+}\pi ^{-}\left ( \gamma \right )$ cross section with the KLOE detector
Autorzy:
Giovannella, S.
Fiore, S.
Graziani, E.
Felici, G.
Czerwiński, Eryk
Loffredo, S.
Moricciani, D.
Erriquez, O.
Bossi, F.
Gauzzi, P.
Redmer, C. F.
Martini, M.
Kupść, A.
Santangelo, P.
Wolke, M.
Di Salvo, R.
Silarski, Michał
Pytko, Izabela
Messi, R.
Miscetti, S.
Venanzoni, G.
Badoni, D.
Ciambrone, P.
Mascolo, M.
Di Domenico, A.
Domenici, D.
Happacher, F.
De Robertis, G.
Di Donato, C.
Iafolla, L.
Martemianov, M.
Zdebik, Jarosław
Prado Longhi, I.
Jacewicz, M.
Budano, A.
Lee-Franzini, J.
Ceradini, F.
Johansson, T.
Passeri, A.
Mandaglio, G.
Taccini, C.
Morello, G.
Caldeira Balkeståhl, L.
Capon, G.
Höistad, B.
Ranieri, A.
Moskal, Paweł
Branchini, P.
Bini, C.
Loddo, F.
Sarra, I.
Leverington, B.
Sciascia, B.
Danè, E.
Babusci, D.
Bencivenni, G.
Gonnella, F.
Fanizzi, G.
Giardina, G.
De Santis, A.
Tortora, L.
Heijkenskjöld, L.
Nguyen, F.
Franzini, P.
Schioppa, M.
Wiślicki, W.
Fantini, A.
Bloise, C.
De Lucia, E.
Patera, V.
Opis:
The muon anomalous magnetic moment is one of the most precisely measured quantities in particle physics and a persistent discrepancy of about $3 \sigma$ between standard model (SM) prediction and the experimental measurement has been observed. The leading order contribution $a_{\mu }^{hlo}$ is actually the main source of uncertainty in the theoretical evaluation of the muon anomaly. It is obtained by a dispersion integral using the precision measurement of hadronic cross section. The KLOE experiment at the DAΦNE $\phi$ −factory in Frascati was the first to exploit Initial State Radiation (ISR) processes to obtain the $e^{+}e^{-}\rightarrow \pi ^{+}\pi ^{-}\left ( \gamma \right )$ cross section below 1 GeV, that accounts for most (70%) of the leading order contribution to the muon anomaly. In year 2005 and 2008 the KLOE-collaboration has published two measurements of the $\pi ^{+}\pi ^{-}$ cross section with the photon in the initial state emitted at small angle, and an independent measurement with the photon emitted at large angle was finalized in year 2011. These measurements were normalized using luminosity from Bhabha. In the last years, a new analysis of KLOE data has been performed for obtaining the pion form factor directly from the bin-by-bin $\pi ^{+}\pi ^{-}\gamma$ to $\mu ^{+}\mu ^{-}\gamma$ ratio. We present the results of this new measurement, showing the comparison with our previous measurements, and its impact on the hadronic contribution to the muon anomaly.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Status and perspectives of the KLOE-2 experiment
Autorzy:
Dané, E.
Moricciani, D.
Erriquez, O.
Bossi, F.
Silarski, Michał
Messi, R.
De Zorzi, G.
Mascolo, M.
Domenici, D.
Prado Longhi, I.
Jacewicz, M.
Budano, A.
Lee-Franzini, J.
Taccini, C.
Morello, G.
Capon, G.
Kulikov, V.
Höistad, B.
Ranieri, A.
Moskal, Paweł
Branchini, P.
Loddo, F.
Sarra, I.
Iarocci, E.
Nguyen, F.
Wiślicki, W.
Schioppa, M.
Schiascia, B.
De Lucia, E.
Fiore, S.
Gauzzi, P.
Martini, M.
Caldiera Balkeståhl, L.
Bocci, V.
Martemianov, Maxim
Venanzoni, G.
Badoni, D.
Stucci, S.
Happacher, F.
Di Donato, C.
Iafolla, L.
Bini, C.
Tortora, L.
Versaci, R.
Franzini, P.
Bulychjev, S.
Sciubba, A.
Matsyuk, M.
Graziani, E.
Kowalewska, A.
Czerwiński, Eryk
Pytko, Izabela
Ciambrone, P.
Campana, P.
De Robertis, G.
Johansson, T.
Passeri, A.
Gonella, F.
Giovanella, S.
Redmer, C. F.
Patera, V.
Felici, G.
Santangelo, P.
Wolke, M.
Miscetti, S.
Di Domenico, A.
Zdebik, Jarosław
Ceradini, F.
Mandaglio, G.
Kupsc, A.
Babusci, D.
Bencivenni, G.
Fanizzi, G.
Giardina, G.
De Santis, A.
Bloise, C.
Achilli, F.
Wydawca:
World Scientific Publishing
Opis:
The KLOE experiment has acquired an integrated luminosity greater than 2.5 fb^{-1} at the peak of ø-resonance on the e^{+]e^{-} DAΦNE collider in the Frascati National Laboratory (LNF). New data taking with the upgraded detector (KLOE-2) and DAΦNE should start in the end of 2011. Main modifications of the detector and new interaction region give a unique possibility to collect about 20 fb^{-1} in 3 years. The KLOE-2 wide scientific program which contains the experimental study of CP and CPT symmetries, quantum decoherence, γγ physics and search of the dark matter is presented and briefly discussed.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Recent results on hadron physics at KLOE
Autorzy:
Gauzzi, P.
Tortora, L.
Ceradini, F.
Babusci, D.
Bloise, C.
Domenici, D.
Erriquez, O.
Messi, R.
Mandaglio, G.
Patera, V.
Loffredo, S.
Martemianov, M.
Sciascia, B.
Gajos, Aleksander
De Robertis, G.
Hoistad, B.
Di Salvo, R.
Branchini, P.
Leverington, B.
Miscetti, S.
Badoni, D.
Felici, G.
Morello, G.
Budano, A.
Sarra, I.
Bencivenni, G.
Taccini, C.
Redmer, C. F.
Santangelo, P.
Wiślicki, W.
Zdebik, Jarosław
Martini, M.
Mascolo, M.
Fantini, A.
Happacher, F.
Capon, G.
Schioppa, M.
Loddo, F.
Bossi, F.
Balkeståhl, L. Caldeira
Ciambrone, P.
De Leo, V.
Palladino, A.
Kupsc, A.
Longhi, I. Prado
Jacewicz, M.
Moricciani, D.
Giardina, G.
Giovannella, S.
Bini, C.
De Santis, A.
Lee-Franzini, J.
Silarski, Michał
Di Domenico, A.
Graziani, E.
Iafolla, L.
Kacprzak, K.
Moskal, Paweł
Venanzoni, G.
Czerwiński, Eryk
Wolke, M.
Fiore, S.
Heijkenskjold, L.
Passeri, A.
Ranieri, A.
Pytko, Izabela
Curciarello, F.
Johansson, T.
Franzini, P.
Dane, E.
Di Donato, C.
De Lucia, E.
Nguyen, F.
Fanizzi, G.
Wydawca:
ARISF
Opis:
One of the basic motivations of the KLOE and KLOE-2 collaborations is the test of fundamental symmetries and the search for phenomena beyond the Standard Model via the hadronic and leptonic decays of ground-state mesons and via their production in the fusion of virtual gamma quanta exchanged between colliding electrons and positrons. This contribution includes brief description of results of recent analysis of the KLOE data aimed at (i) the search for the dark matter boson, (ii) determination of the hadronic and light-by-light contributions to the g-2 muon anomaly and (iii) tests of QCD anomalies.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Physics topics at KLOE-2
Autorzy:
Johansson, T.
Kulikov, V.
Höistad, B.
Di Domenico, A.
Giardina, G.
Mandaglio, G.
Martini, M.
Nguyen, F.
Czerwiński, Eryk
Jacewicz, M.
Kowalewska, A.
Budano, A.
Campana, P.
Fanizzi, G.
Matsyuk, M.
Prado Longhi, I.
Wolke, M.
Babusci, D.
Moricciani, D.
De Robertis, G.
Morello, G.
Zdebik, Jarosław
De Zorzi, G.
Martemianov, M.
Mascolo, M.
Lee-Franzini, J.
Ciambrone, P.
Miscetti, S.
Sarra, I.
Bencivenni, G.
Di Donato, C.
Versaci, R.
Felici, G.
Bloise, C.
Caldeira Balkeståhl, L.
Dané, E.
De Santis, A.
Domenici, D.
Tortora, L.
Balwierz, I.
Capon, G.
Messi, R.
Bossi, F.
Happacher, F.
Graziani, E.
Passeri, A.
Bulychjev, S. A.
Badoni, D.
Fiore, S.
Loddo, F.
Sciubba, A.
Venanzoni, G.
Ceradini, F.
Gauzzi, P.
Kupsc, A.
Branchini, P.
Bocci, V.
Taccini, C.
Giovannella, S.
Patera, V.
Wiślicki, W.
Sciascia, B.
Santangelo, P.
Erriquez, O.
Iafolla, L.
Bini, C.
Redmer, C. F.
Franzini, P.
Gonnella, F.
Iarocci, E.
Moskal, Paweł
Archilli, F.
Silarski, Michał
Ranieri, A.
De Lucia, E.
Opis:
The goal of the KLOE-2 experiment operating at the upgraded DA$\Phi$NE $e^{+}e^{-}$ collider is to collect an integrated luminosity of about $20 fb^{-1}$ over 3-4 years of running. The KLOE-2 apparatus is now equipped with an inner tracker, new scintillation calorimeters and tagging detectors for $\gamma \gamma$ physics. These will allow measurements to refine and extend the KLOE programme on kaon physics and tests of fundamental symmetries as well as quantum interferometry. Here the latest results from the KLOE data analysis are presented and the perspectives at KLOE-2 outlined.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Tytuł:
Search for the CP violating $K_{S} \rightarrow 3\pi^{0}$ decay with the KLOE detector
Autorzy:
Johansson, T.
Fantini, A.
Di Salvo, R.
Di Domenico, A.
Hoistad, B.
De Leo, V.
Giardina, G.
Mandaglio, G.
Silarski, Michał
Czerwiński, Eryk
Jacewicz, M.
Martini, M.
Budano, A.
Fanizzi, G.
Nguyen, F.
Prado Longhi, I.
Schioppa, M.
Wolke, M.
Babusci, D.
Loffredo, S.
Moricciani, D.
De Robertis, G.
Morello, G.
Zdebik, Jarosław
Martemianov, M.
Mascolo, M.
Lee-Franzini, J.
Ciambrone, P.
Miscetti, S.
Sarra, I.
Bencivenni, G.
Di Donato, C.
Leverington, B.
Felici, G.
Bloise, C.
Caldeira Balkeståhl, L.
De Santis, A.
Domenici, D.
Tortora, L.
Curciarello, F.
Capon, G.
Messi, R.
Bossi, F.
Heijkenskjold, L.
Happacher, F.
Graziani, E.
Passeri, A.
Badoni, D.
Fiore, S.
Loddo, F.
Venanzoni, G.
Ceradini, F.
Gauzzi, P.
Kupsc, A.
Branchini, P.
Taccini, C.
Danè, E.
Giovannella, S.
Patera, V.
Wiślicki, W.
Sciascia, B.
Santangelo, P.
Erriquez, O.
Iafolla, L.
Bini, C.
Redmer, C. F.
Franzini, P.
Gonnella, F.
Moskal, Paweł
Ranieri, A.
Pytko, Izabela
De Lucia, E.
Kacprzak, K.
Opis:
We present a new search for the $K_{S}\rightarrow 3\pi ^{0}$ decay performed with the KLOE detector operating at the DAΦNE $\phi$ -factory. The $K_{S}$ mesons were tagged via registration of $K_{L}$ mesons which crossed the drift chamber without decaying and interacted with the KLOE electromagnetic calorimeter. The $K_{S}\rightarrow 3\pi ^{0}$ decay was then searched requiring six prompt photons. To suppress background, originating from fake $K_{S}$ tags and $K_{S}\rightarrow 2\pi ^{0}$ decays with additional two spurious clusters, we have performed a discriminant analysis based on kinematical fit, testing of the signal and background hypotheses and exploiting of the differences in kinematics of the $K_{S}$ decays into $2\pi ^{0}$ and $3\pi ^{0}$. In a sample of about 1.7$\cdot 10^{9} \phi \rightarrow K_{S}K_{L}$ events we have found no candidates in data and simulated background samples. Normalizing to the number of $K_{S}\rightarrow 2\pi^{0}$ events in the same sample, we have set the upper limit on the $K_{S}\rightarrow 3\pi^{0}$ branching ratio BR $\left ( K_{S}\rightarrow 3\pi^{0} \right )< 2.6\cdot 10^{-8}$ at 90% C.L., five times lower than the previous limit. This upper limit can be translated into a limit on the modulus of the $\eta _{000}$ parameter amounting to $\left | \eta _{000} \right |< 0.0088$ at 90% C.L., improving by a factor two the latest direct measurement.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Inne
Wyświetlanie 1-10 z 36

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