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![Download Search for the Rare Decay K↑+ --> [pi]↑+[upsilon] [anti-upsilon] PDF Online Free](https://books.google.com/books/content/images/frontcover/1K1gNAEACAAJ?fife=w200-h370)
Author : J.-M. Poutissou
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (268 download)
Download or read book Search for the Rare Decay K↑+ --> [pi]↑+[upsilon] [anti-upsilon] written by J.-M. Poutissou and published by . This book was released on 1990 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 570 pages
Book Rating : 4.0/5 ( download)
Download or read book High Energy Physics Index written by and published by . This book was released on 1993 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download A Search for the Rare Decay B -] Pi Ll− PDF Online Free](https://books.google.com/books/content/images/frontcover/Ym1ZAQAACAAJ?fife=w200-h370)
Author : Bradley Cole Wray
Publisher :
ISBN 13 :
Total Pages : 612 pages
Book Rating : 4.:/5 (8 download)
Download or read book A Search for the Rare Decay B -] Pi Ll− written by Bradley Cole Wray and published by . This book was released on 2012 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a search for the rare B meson decay B -> pi ll− (l=e or mu) using 428 fb−1 of data collected at the Upsilon(4S) resonance by the BaBar detector at the PEP-II asymmetric energy ee− storage rings located located at SLAC National Accelerator Laboratory in Menlo Park, California. Four exclusive modes are studied: B+ -> pi+ e+e−, B+ -> pi+ mu+mu−, B0 -> pi0 e+e−, and B0 -> pi0 mu+mu−. Branching fraction upper limits at the 90% confidence level are presented for the exclusive modes B+ -> pi+ mu+mu− and B0 -> pi0 mu+mu−, and the combined mode B -> pi mu+mu−.
Download or read book Search for Primarily Non-interacting Decay Modes of the Upsilon written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hadronic transition UPSILON(2S) .-->. .pi.°.pi.°UPSILON(1S) is utilized to search for the reactions: UPSILON(1S) .-->. non-interacting particles and UPSILON(1S) .-->. .gamma. + non-interacting particles. 44 pb−1 of UPSILON(2S) data were taken by the Crystal Ball detector at the DORIS II storage ring in order to perform this study. An upper limit of BR(UPSILON .-->. Unseen) 12% (90% C.L.), is obtained via this approach. The second process investigated involved the radiative decay of the Upsilon into non-interacting particles. 57 pb−1 of UPSILON(2S) data was available for this study. An upper limit on the branching ratio BR(UPSILON .--. .gamma. + Unseen) is measured for photon energies in the range 500 MeV E.gamma.
![Download Search for the Rare Decay K[L] [right Arrow] [pi]0[pi]0[gamma] PDF Online Free](https://books.google.com/books/content/images/frontcover/1CEqAAAAYAAJ?fife=w200-h370)
Author : David Edward Smith
Publisher :
ISBN 13 :
Total Pages : 364 pages
Book Rating : 4.X/5 (3 download)
Download or read book Search for the Rare Decay K[L] [right Arrow] [pi]0[pi]0[gamma] written by David Edward Smith and published by . This book was released on 2006 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Measurement of the Decay UPSILON(2S). --]. Pi. °. Pi. °UPSILON(1S). PDF Online Free](https://books.google.com/books/content/images/frontcover/2AyfAQAACAAJ?fife=w200-h370)
Download or read book Measurement of the Decay UPSILON(2S). --]. Pi. °. Pi. °UPSILON(1S). written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hadronic transitions UPSILON(2S) .-->. .pi.°.pi. UPSILON(1S) .-->. .gamma gamma gamma gamma.ll− (l = .mu. or e) are investigated using the Crystal Ball detector. The analysis is based on 193,000 UPSILON(2S) events produced at the DORIS II ee− storage ring from November 1982 to February 1984. We observe 44 events with a muon pair and 46 events with an electron pair in the final state. The signals in both channels are relatively background free. Assuming lepton universality, we average the results for the two channels and obtain the product branching ratio B(UPSILON(2S) .-->. .pi.°.pi.°UPSILON(1S)) x B/sub ll/(UPSILON(1S)) = (2.3 +- 0.3 +- 0.3) x 10−3 where the first error is statistical and the second is systematic. Using the present world average value of B/sub ll/(UPSILON(1S)) = (2.9 +- 0.3)% we derive a branching ratio B(UPSILON(2S) .-->. .pi.°.pi.°UPSILON(1S)) = (8.0 +- 1.5)% where the statistical and systematic errors have been added in quadrature. This result is compared with previous results for the charged pion transitions UPSILON(2S) .-->. .pi.+.pi.−UPSILON(1S) and with the expectation from theory. We have also investigated the mass spectrum M/sub .pi.°.pi.°/ resulting from these decays and find a peaking toward high masses not accounted for the phase space alone. Fits to the .pi.°.pi.° mass spectrum are in quantitative agreement with previous results for the .pi.+.pi.− transitions. Angular distribution for the .pi.°.pi.° system and its decay products are presented in reference frames appropriate for analyzing the spin of the .pi.°.pi.° system, even if the initial UPSILON(1S) and the di-pion system are emitted in a relative S-wave. We find the decay distributions to be consistent with those expected for a spin zero di-pion system emitted in a relative S-wave with the UPSILON(1S).
Author : Douglas Burt Clarke
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (89 download)
Download or read book Search for the Rare Decay, K+(right Arrow)(pi)+e+e− written by Douglas Burt Clarke and published by . This book was released on 1972 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Experiments in Elementary Particle Physics written by and published by . This book was released on 1985 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : G. P. Yost
Publisher :
ISBN 13 :
Total Pages : 604 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Guide to Data in Elementary Particle Physics written by G. P. Yost and published by . This book was released on 1986 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Search For the Rare Decay K(L) ---] Pi0 Pi0 Gamma PDF Online Free](https://books.google.com/books/content/images/frontcover/HmeaAQAACAAJ?fife=w200-h370)
Author : David Edward Smith
Publisher :
ISBN 13 :
Total Pages : 141 pages
Book Rating : 4.:/5 (316 download)
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.
Author :
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ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (16 download)
Download or read book A Search for Invisible Decays of the Upsilon(1S). written by and published by . This book was released on 2009 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We search for invisible decays of the?(1S) meson using a sample of 91.4 x 106?(3S) mesons collected at the BABAR/PEP-II B Factory. We select events containing the decay?(3S) →??−?(1S) and search for evidence of an undetectable?(1S) decay recoiling against the dipion system. We set an upper limit on the branching fraction?(?(1S) → invisible)
Author :
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (873 download)
Download or read book A Search for the Rare Decay $B\rightarrow\gamma\gamma$ written by and published by . This book was released on 2011 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the result of a search for the rare decay B° 2![gamma][gamma] in 426 fb−1 of data, corresponding to 226 million B°{bar B}° pairs, collected on the [Upsilon](4S) resonance at the PEP-II asymmetric-energy ee− collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 2112{sup +13} signal events with a statistical signficance of 1.9 [sigma]. This corresponds to a branching fraction [Beta](B° 2![gamma][gamma]) = (1.7 ± 1.1(stat.) ± 0.2(syst.)) x 10−7. Based on this result, we set a 90% confidence level upper limit of [Beta](B° 2![gamma][gamma])
 Goes to [pi]0[pi]0[upsilon](1S) PDF Online Free](https://books.google.com/books/content/images/frontcover/PIYgAQAAIAAJ?fife=w200-h370)
Author : David Michael Gelphman
Publisher :
ISBN 13 :
Total Pages : 254 pages
Book Rating : 4.F/5 ( download)
Download or read book Measurement of the Decay [upsilon](2S) Goes to [pi]0[pi]0[upsilon](1S) written by David Michael Gelphman and published by . This book was released on 1985 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. Vazquez
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (316 download)
Download or read book The Search for the Rare Decay B to A0+pi0 written by W. Vazquez and published by . This book was released on 2006 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay B{+-} {yields} a{sub 0}{sup {+-}}{pi}{sup 0} with the a{sub 0}{sup +} decaying to an {eta} and a {pi}{sup +} was carried out at the Stanford Linear Accelerator Center using the BABAR detector coupled with the PEP-II collider. The analysis used a data sample comprised of approximately 252 million B{bar B} pairs collected at the {Upsilon}(4S) resonance. No signal was observed and a 90% confidence level upper limit on the branching fraction was set at 1.32 x 10{sup -6}.
Author : Vijay Singh Potlia
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (496 download)
Download or read book Search for Radiative Decays of Upsilon(1S) Into Eta and Eta-prime written by Vijay Singh Potlia and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: We conducted a new search for the radiative decay of Upsilon(1S) to the pseudoscalar mesons eta and eta-prime in (21.2"0.2) x 106 Upsilon(1S) decays collected with the CLEO III detector operation at the Cornell Electron Strorage Ring (CESR). The eta meson was reconstructed in the three modes eta to gamma gamma, eta to pipi−pi0 or eta to pi0 pi0 pi0. The eta-prime meson was reconstructed in the mode eta-prime to pi pi− eta with eta decaying through any of the above three modes; and also eta-prime to gamma rho0, where rho0 to pi+ pi−-. The first six of these decay chains were searched for in the previous CLEO II analysis on this subject, which used a data sample 14.6 times smaller. Five of the seven submodes were virtually background free. We found no signal events in four of them. The only exception was Upsilon(1S) to gamma eta-prime; eta to pi+ pi− pi0 where we observed two good signal candidates. The other two submodes (eta to gamma gamma and eta-prime to gamma rho) are background limited, and showed no excess of events in the signal region. We combined the results from different channels and obtained 90% confidence level (C.L.) upper limits branching fraction(Upsilon(1S) to gamma eta)
![Download Search for the Rare Decay K(L) ---] Pi0 Pi0 Gamma PDF Online Free](https://books.google.com/books/content/images/frontcover/9FSuAQAACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (873 download)
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.
![Download Search for Exotic Decay Modes of the [upsilon] (1S) PDF Online Free](https://books.google.com/books/content/images/frontcover/Dq7MPgAACAAJ?fife=w200-h370)
Author : ARGUS Collaboration
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (354 download)
Download or read book Search for Exotic Decay Modes of the [upsilon] (1S) written by ARGUS Collaboration and published by . This book was released on 1986 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
