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Study Of The K To Pi Pi0 Gamma Decays At The Na48 2 Experiment At The Cern Sps
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Book Synopsis Study of the K to Pi Pi0 Gamma Decays at the NA48/2 Experiment at the CERN SPS by : Silvia Goy López
Download or read book Study of the K to Pi Pi0 Gamma Decays at the NA48/2 Experiment at the CERN SPS written by Silvia Goy López and published by . This book was released on 2006 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NA48/2 experiment at the CERN SPS has collected a large sample of K to pi pi0 gamma decays.Two amplitudes contribute to these decays. The dominant one comes from Inner Bremsstrahlung (IB) in the K to pi pi0 process. The second one is given by the Direct Emission (DE) of the photon at the weak vertex from an intermediate state of the decay. The simplest radiative transitions are electric dipole (E1) and magnetic dipole (M1). Electric amplitudes can interfere with IB, and CP violation and possible non-SM effects can show up in th e corresponding interference (INT) term.In this work a sub sample of the data has been analyzed. About 120000 K to pi pi0 gamma decays, with negligible background contamination have been reconstructed in the ranges 0.2
Book Synopsis Study of the K±->π±π0γ Decays at the NA48/2 Experiment at the CERN SPS by : Silvia Goy López
Download or read book Study of the K±->π±π0γ Decays at the NA48/2 Experiment at the CERN SPS written by Silvia Goy López and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis First Observation of the Decay Ks [yields Pi]0[mu]+[mu]− at the NA48 Experiment at CERN. by : Maria Teresa Fonseca Martín
Download or read book First Observation of the Decay Ks [yields Pi]0[mu]+[mu]− at the NA48 Experiment at CERN. written by Maria Teresa Fonseca Martín and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the KS → pi 0mu+mu- decay was performed by the NA48/1 Collaboration at the CERN SPS accelerator. Six events were found with a background expectation of 0.22+0.18-0.11 in the data collected in 2002 from the high-intensity K S run. The measured branching ratio is: BR( KS → pi0mu+mu -) = [ 2.9+1.5-1.2 (stat) +/- 0.2(syst)] x 10-9, assuming that only vector currents contribute to the matrix element, and a unit form factor.
Book Synopsis Study of the Rare Decay K(L) ---] Pi0 Gamma Gamma at KTeV. by :
Download or read book Study of the Rare Decay K(L) ---] Pi0 Gamma Gamma at KTeV. written by and published by . This book was released on 2007 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors study on the rare decay K{sub L} 2![pi]°[gamma][gamma], measure a{sub V}, and branching ratio by analyzing 96, 97 and 99 data. The measurements were taken by KTeV at Fermi National Accelerator Laboratory. After all cuts, they have 1982 K{sub L} 2![pi]°[gamma][gamma] candidate. The background level is estimated as 30%. K{sub L} 2![pi]°[gamma][gamma] branching ratio is measured as (1.29 ± 0.03(stat) ± 0.04(sys)) x 10−6. By using D'Ambrosio's theory to fit a{sub V}, a{sub V} = -( -0.31 ± 0.05(stat) ± 0.07(sys)).
Book Synopsis Experimental Study of the Decay K Plus Til Pi 0 E Plus Gamma by : Robert W. Garland
Download or read book Experimental Study of the Decay K Plus Til Pi 0 E Plus Gamma written by Robert W. Garland and published by . This book was released on 1967 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of the Decay K+[arrow Leads to Right] [pi]0 E+[gamma] by : Robert W. Garland
Download or read book Experimental Study of the Decay K+[arrow Leads to Right] [pi]0 E+[gamma] written by Robert W. Garland and published by . This book was released on 1967 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for the Rare Decay K(L) ---] Pi0 Pi0 Gamma by :
Download or read book Search for the Rare Decay K(L) ---] Pi0 Pi0 Gamma written by and published by . This book was released on 2007 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The KTeV E799 experiment has conducted a search for the rare decay K{sub L} 2![pi]°°[gamma] via the topology K{sub L} 2![pi]°[pi]°{sub D}[gamma] (where [pi]°{sub D} 2![gamma]ee−). Due to Bose statistics of the [pi]° pair and the real nature of the photon, the K{sub L} 2![pi]°[pi]°[gamma] decay is restricted to proceed at lowest order by the CP conserving direct emission (DE) of an E2 electric quadrupole photon. The rate of this decay is interesting theoretically since chiral perturbation theory predicts that this process vanishes at level O(p4). Therefore, this mode probes chiral perturbation theory at O(p6). In this paper we report a determination of an upper limit of 2.43 x 10−7 (90% CL) for K{sub L} 2![pi]°[pi]°[gamma]. This is approximately a factor of 20 lower than previous results.
Book Synopsis An Experimental Study of K+ --> [pi]+ [pi]0 [pi]0 Decays by : Richard Michael Dowd
Download or read book An Experimental Study of K+ --> [pi]+ [pi]0 [pi]0 Decays written by Richard Michael Dowd and published by . This book was released on 1965 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Final Results from the KTeV Experiment on the Decay K(L) ---] Pi0 Gamma Gamma by :
Download or read book Final Results from the KTeV Experiment on the Decay K(L) ---] Pi0 Gamma Gamma written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on a new measurement of the branching ratio B(K{sub L} → [pi]°[gamma][gamma]) using the KTeV detector. They reconstruct 1982 events with an estimated background of 608, that results in B(K{sub L} → [pi]°[Gamma][gamma]) = (1.29 ± 0.03{sub stat} ± 0.05{sub syst}) x 10−6. They also measure the parameter, a{sub V}, which characterizes the strength of vector meson exchange terms in this decay. They find a{sub V} = -0.31 ± 0.05{sub stat} ± 0.07{sub syst}. These results utilize the full KTeV data set collected from 1997 to 2000 and supersede earlier KTeV measurements of the branching ratio and a{sub V}.
Book Synopsis A Measurement of the Branching Ratio of the [pi]0 Dalitz Decay Using K(L) 2!3 [pi]0 Decays from KTeV. by :
Download or read book A Measurement of the Branching Ratio of the [pi]0 Dalitz Decay Using K(L) 2!3 [pi]0 Decays from KTeV. written by and published by . This book was released on 2007 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present a measurement of B([pi]0 2!e+e-[gamma])/B([pi]0 2![gamma][gamma]) using data taken in 1999 by the E832 KTeV experiment at Fermilab. The [pi]0s were produced by KL decays in flight that are fully reconstructed. They find 63,693 KL 2!3[pi]0 2![gamma][gamma] [gamma][gamma] e+e-[gamma] decays in KTeV data (an increase of a factor of ~ 20 in event statistics over previous experiments), and normalize to KL 2!3[pi]0 2!6[gamma], to extract B([pi]0 2!e+e-[gamma], me+e-> 15 MeV/c2
Book Synopsis Search For the Rare Decay K(L) ---] Pi0 Pi0 Gamma by : David Edward Smith
Download or read book Search For the Rare Decay K(L) ---] Pi0 Pi0 Gamma written by David Edward Smith and published by . This book was released on 2006 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a search for the rare decay K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{gamma} using data from the KTeV experiment, using the topology K{sub L} {yields} {pi}{sup 0}{pi}{sub D}{sup 0}{gamma} (where {pi}{sub D}{sup 0} {yields} {gamma}e{sup +}e{sup -}). Due to Bose statistics and the real nature of the photon, the K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{gamma} decay can proceed at lowest order only by the Cp conserving direct emission of an E2 photon. The decay vanishes to O(p{sup 4}) in chiral perturbation theory and is a probe of the theory to the sixth order. The primary background to this decay consists of K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{pi}{sub D}{sup 0} events with one lost photon. The upper limit for the decay K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{gamma} presented in this thesis is 2.32 x 10{sup -7} at the 90% confidence level. This upper limit was derived from both 1997 and 1999 data, using a blind analysis. The upper limit was derived from a Feldman-Cousins method, based on a weighted total of 0.53 data events in the signal region with an expected K{sub L} {yields} {pi}{sup 0}{pi}{sup 0}{pi}{sub D}{sup 0} background of 0.37 {+-} 0.28 events. The previous upper limit for this decay was 5.6 x 10{sup -6} at the 90% confidence level.
Book Synopsis PRELIMINARY STUDY OF D0 ---] K PI PI0 DECAYS WITH DALITZ PLOTS. by :
Download or read book PRELIMINARY STUDY OF D0 ---] K PI PI0 DECAYS WITH DALITZ PLOTS. written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle physicists study the smallest particles and most basic rules of their interactions in humankind's current scope. The Charm Analysis Working Group (CWG) of the BaBar Collaboration studies decays involving the charm quark. They currently study mixing in D decays, an interesting and poorly understood phenomenon in current physics models. We, as part of the CWG, investigated the plausibility of using Dalitz plots and the BaBar analysis framework to study mixing in Wrong Sign (WS) D[sup 0][yields] K[pi][pi][sup 0] decays. Others in the CWG have studied mixing in the 2-body decay, D[sup 0][yields] K[pi]. The 3-body decay analyzed with the RooFitDalitz analysis package and Dalitz plots provides more information and another way of separating Doubly Cabibbo Suppressed Decays (DCSD) from mixing--which share the same end products. Through doing many simulations, we have demonstrated the usefulness of this approach. We selected D[sup 0][yields] K[pi][pi][sup 0] events from Simulation Production run No. 4 (SP4) and BaBar's run 1 and run 2. We made Dalitz plots with this data. Now that we better understand Dalitz plots and software, we plan to select WS D[sup 0][yields] K[pi][pi][sup 0] events and perform rate fits as discussed in BaBar Analysis Document (BAD) No. 443, as well as fits for several different decay times and resonances, in order to further distinguish DCSD from mixing.
Book Synopsis Prospects for Observing K. --]. Pi. Nu Anti Nu by :
Download or read book Prospects for Observing K. --]. Pi. Nu Anti Nu written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the progress of experiment 787 at Brookhaven National Laboratory designed to study K ..-->.. ..pi.. + ' ... ', where ' ... ' is a one or more feebly interacting neutrals. The experiment will have an initial sensitivity of 2 x 10−1° for two or more particles (e.g., K+ ..-->.. ..pi..+nu anti nu), and 4 x 10−11 for one particle (e.g., K+ ..-->.. ..pi..+ + axion). The experiment can also study such reactions as K+ ..-->.. ..pi..+..gamma gamma.., K+ ..-->.. ..pi..+..mu../sup + -/e/sup - +/, K+ ..-->.. ..mu..+nu..gamma.., ..pi..° ..-->.. nu anti nu, and ..pi..° ..-->.. e+e−. 6 refs., 4 figs.
Book Synopsis Status of a Study of the Decay K. --]. Pi. . Nu by :
Download or read book Status of a Study of the Decay K. --]. Pi. . Nu written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: AGS-787, BNL-Princeton-TRIUMF, began taking data in February 1988 on rare K decays into .pi. and non-interacting neutrals. Recent observations of B-/bar B/ mixing have sharpened the branching ratio prediction of the three generation standard model, (SM), to (approximately) 1-5 x 10−1° for .pi.+.nu./bar /nu//. The detector has 2.pi. acceptance for this decay and 4.pi. acceptance for background gammas. A very large window for viewing new physics exists between the SM value and the previous experimental limit of 1.4 x 10−7. Several other predicted rare K+ decays can be detected. The performance of the detector is described. 8 refs., 4 figs.
Book Synopsis An Experimental Study of K+(right Arrow)(pi)+(pi)(̊pi) ̊ Decays by : Richard M. Dowd
Download or read book An Experimental Study of K+(right Arrow)(pi)+(pi)(̊pi) ̊ Decays written by Richard M. Dowd and published by . This book was released on 1965 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of [eta] --> [pi]@@@ Decay Using the Quark-box Diagram by : John N. Ng
Download or read book A Study of [eta] --> [pi]@@@ Decay Using the Quark-box Diagram written by John N. Ng and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Measurement of the Decays Eta Til Pi+ Pi- Gamma and Eta Til Pi+ Pi- Pi0 Gamma by : Jon J. Thaler
Download or read book Experimental Measurement of the Decays Eta Til Pi+ Pi- Gamma and Eta Til Pi+ Pi- Pi0 Gamma written by Jon J. Thaler and published by . This book was released on 1972 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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