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Dive into the research topics where R. Janicek is active.

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Featured researches published by R. Janicek.


Physical Review D | 2001

Search for the decay B+→D*+Ks 0

A. Gritsan; J. P. Alexander; R. Baker; C. Bebek; B. E. Berger; K. Berkelman; F. Blanc; V. Boisvert; D. G. Cassel; P. S. Drell; J. E. Duboseq; K. M. Ecklund; R. Ehrlich; P. Gaidarev; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; P. I. Hopman; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; M. Lohner; A. Magerkurth; T. O. Meyer; N. B. Mistry; E. Nordberg; M. Palmer

We report on a search for the decay B+ -> D*+ K0_S and its charge conjugate with the CLEO detector at the Cornell Electron Storage Ring (CESR). No candidates are found in 9.10/fb of data. The background is estimated to be 0.29 +- 0.05 leading to an upper limit BF(B+ -> D*+ K0_S) = 9.5 x 10^{-5} (90% C.L.).


Physical Review Letters | 1998

Observation of High Momentum {ital {eta}}{sup {prime}} Production in {ital B} Decays

T. E. Browder; Y. Li; J. L. Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; R. M. Hans; E. Johnson; I. Karliner; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; A. Bellerive; R. Janicek; D. B. MacFarlane; P. M. Patel; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; C. Darling; Robert F. Davis; S. Kotov; I. Kravchenko; N. Kwak

We report the first observation of B{r_arrow}{eta}{sup {prime}}X transitions with high momentum {eta}{sup {prime}} mesons. We observe 39.0{plus_minus}11.6 B decay events with 2.0{lt}p{sub {eta}{sup {prime}}}{lt}2.7 GeV/c , the high momentum region where background from b{r_arrow}c processes is suppressed. We discuss the physical interpretation of the signal, including the possibility that it is due to b{r_arrow}sg{sup {asterisk}} transitions. Given that interpretation, we find B(B{r_arrow}{eta}{sup {prime}}X{sub s} )=[6.2{plus_minus}1.6(stat){plus_minus} 1.3(syst){sup +0.0}{sub {minus}1.5} (bkg)]{times}10{sup {minus}4} for 2.0{lt}p{sub {eta}{sup {prime}}}{lt}2.7 GeV/c . {copyright} {ital 1998} {ital The American Physical Society }


Physical Review Letters | 1998

First Observation of the Cabibbo Suppressed Decay {ital B}{sup {ital +}}{ital {r_arrow} {bar {ital D}}}{sup {ital 0}}{ital K}{sup +}

M. Athanas; P. Avery; C. D. Jones; M. Lohner; S. Patton; C. Prescott; J. Yelton; J. Zheng; G. Brandenburg; R. A. Briere; A. Ershov; Y. S. Gao; D. Y. Kim; R. J. Wilson; H. Yamamoto; T. E. Browder; Y. Li; Jorge Luis Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; R. M. Hans; E. Johnson; I. Karliner; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards

We have observed the decay of the


Physical Review Letters | 1998

New Measurement of {ital B} {r_arrow} {ital D}{sup {asterisk}}{ital {pi}} Branching Fractions

G. Brandenburg; R. A. Briere; Y. S. Gao; D. Y. Kim; R. J. Wilson; H. Yamamoto; T. E. Browder; F. Li; Y. Li; J. L. Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; R. M. Hans; E. Johnson; I. Karliner; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; A. Bellerive; R. Janicek; D. B. MacFarlane; K. W. McLean; P. M. Patel; A. J. Sadoff; R. Ammar; P. Baringer

B^-


Physical Review Letters | 1998

Two-Body {ital B} Meson Decays to {ital {eta}} and {ital {eta}}{sup {ital {prime}}} : Observation of {ital B{r_arrow}{eta}}{sup {ital {prime}}}{ital K}

B. H. Behrens; W. T. Ford; A. V. Gritsan; H. Krieg; J. Roy; J. G. Smith; M. Zhao; J. P. Alexander; R. Baker; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; V. Boisvert; D. G. Cassel; D. S. Crowcroft; M. Dickson; S. von Dombrowski; P. S. Drell; K. M. Ecklund; R. Ehrlich; A. D. Foland; P. Gaidarev; L. Gibbons; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; P. I. Hopman; J. Kandaswamy

meson into


Physical Review Letters | 1997

Measurement of the {ovr {ital B}} {r_arrow} {ital Dl}{ovr {nu} } Partial Width and Form Factor Parameters

M. Athanas; P. Avery; C. D. Jones; M. Lohner; C. Prescott; J. Yelton; J. Zheng; G. Brandenburg; R. A. Briere; A. Ershov; Y. S. Gao; D. Y. Kim; R. J. Wilson; H. Yamamoto; T. E. Browder; F. Li; Y. Li; J. L. Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; R. M. Hans; E. Johnson; I. Karliner; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards

D^0 K^-


Physical Review Letters | 1997

Search for the Decays {ital B}{sup 0}{r_arrow}{ital D}{sup ({asterisk})+}{ital D}{sup ({asterisk}){minus}}

D. M. Asner; Daniel W. Bliss; W. S. Brower; G. Masek; H. P. Paar; V. Sharma; J. Gronberg; R. Kutschke; D. J. Lange; Stephen Burns Menary; R. J. Morrison; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. A. Roberts; A. Ryd; Witherell; R. Balest; B. H. Behrens; K. Cho; W. T. Ford; H. Park; P. Rankin; J. Roy; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman

, using 3.3 million


Physical Review Letters | 1997

Observation of the Decay {ital D}{sup +}{sub {ital s}} {r_arrow} {ital {omega}{pi}}{sup +}

R. Balest; B. H. Behrens; K. Cho; W. T. Ford; H. Park; P. Rankin; J. Roy; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; K. M. Ecklund; R. Ehrlich; R. Elia; A. D. Foland; P. Gaidarev; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; P. I. Hopman; J. Kandaswamy

B\bar B


Physical Review D | 1996

Analysis of {ital D}{sup 0}{r_arrow}{ital K{bar K}X} decays

D. M. Asner; M. Athanas; Daniel W. Bliss; W. S. Brower; G. Masek; H. P. Paar; J. Gronberg; C. M. Korte; R. Kutschke; Stephen Burns Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. A. Roberts; A. Ryd; H. Tajima; Witherell; R. Balest; K. Cho; W. T. Ford; M. Lohner; H. Park; P. Rankin; J. Roy; J. G. Smith; J. P. Alexander; C. Bebek

pairs collected with the CLEO II detector at the Cornell Electron Storage Ring. We find the branching fractions of this decay to be suppressed relative to the decay into


Physical Review Letters | 1995

Measurement of the D+s--> eta

G. Brandenburg; D. Cinabro; T. Liu; M. Saulnier; R. J. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; K. W. McLean; M. Ogg; A. Bellerive; D. Britton; E. R. F. Hyatt; R. Janicek; D. B. MacFarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage

D^0 \pi^-

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R. Ammar

University of Kansas

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M. Palmer

University of Cambridge

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