Download or read book Limit on the Rare Decay B mu sup mu sup K written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Limit on the Rare Decay B yields mu sup mu sup minus K sup plus minus written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for flavor-changing neutral current decays of B mesons into [mu][mu]K[sup [plus-minus]] using data obtained in the Collider Detector at Fermilab (CDF) 1992--1993 data taking run. To reduce the amount of background in our data we use precise tracking information from the CDF silicon vertex detector to pinpoint the location of the decay vertex of the B candidate, and accept only events which have a large decay time. We compare this data to a B meson signal obtained in a similar fashion, but where the muon pears originate from [psi] decays, and calculate the relative branching ratios. In absence of any indication of flavor-changing neutral current decay we set an upper limit on the branching ratio of 3.2 [times] 10[sup [minus]1], which is consistent with Standard Model expectations but leaves little room for non-standard physics.

Download or read book A New Expected Upper Limit on the Rare Decay B s Mu Mu with the D0 Experiment written by and published by . This book was released on 2009 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a new expected upper limit of the rare decay branching ratio B{sub s} →??− using about 5 fb−1 of Run II data collected with the D0 detector at the Tevatron. When setting limits on the branching ratio, selected events are normalized to reconstructed B{sup {+-}} → J/?K{sup {+-}} events in order to decrease the systematic uncertainty. The resulting expected upper limit is?(B{sub s} →?+?−) = 4.3(5.3) x 10−8 at the 90% (95%) C.L.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Limits on Rare B Decays B yields mu sup mu sup minus K sup and B yields mu sup mu sup minus K sup 0 written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors report on a search for flavor-changing neutral current decays of B mesons B[yields][mu][sup+][mu][sup[minus]]K[sup[+-]] and B[yields][mu][sup+][mu][sup[minus]]K*[sup 0] using data obtained in the Collider Detector at Fermilab (CDF) 1992--1993 data taking run. To reduce the amount of background in the data the authors use precise tracking information from the CDF silicon vertex detector to pinpoint the location of the decay vertex of the B candidate, and accept only events which have a large decay time. They compare this data to a B meson signal obtained in a similar fashion, but where the muon pairs originate from[psi] decays, and calculate the relative branching ratios. In absence of any indication of flavor-changing neutral current decays they set an upper limits of BR(B[yields][mu][sup+][mu][sup[minus]]K[sup[+-]])

Download or read book Cities and Their Vital Systems written by Advisory Committee on Technology and Society and published by National Academies Press. This book was released on 1989 with total page 1298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cities and Their Vital Systems asks basic questions about the longevity, utility, and nature of urban infrastructures; analyzes how they grow, interact, and change; and asks how, when, and at what cost they should be replaced. Among the topics discussed are problems arising from increasing air travel and airport congestion; the adequacy of water supplies and waste treatment; the impact of new technologies on construction; urban real estate values; and the field of "telematics," the combination of computers and telecommunications that makes money machines and national newspapers possible.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 1398 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evidence for the Rare Decay B yields K ell sup ell sup Land Measurement of the B yields K ell sup ell sup Branching Fraction written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present evidence for the flavor-changing neutral current decay B[yields] K*[ell][sup+][ell][sup -] and a measurement of the branching fraction for the related process B[yields] K[ell][sup+][ell][sup -], where[ell][sup+][ell][sup -] is either an e[sup+]e[sup -] or[mu][sup+][mu][sup -] pair. These decays are highly suppressed in the Standard Model, and they are sensitive to contributions from new particles in the intermediate state. The data sample comprises 123 x 10[sup 6][Upsilon](4S)[yields] B[bar B] decays collected with the BABAR detector at the PEP-II e[sup+]e[sup -] storage ring. Averaging over K* isospin and lepton flavor, we obtain the branching fractions[Beta](B[yields] K[ell][sup+][ell][sup -])= (0.65[sub -0.13][sup+0.14][+-] 0.04) x 10[sup -6][Beta](B[yields] K*[ell][sup+][ell][sup -])= (0.88[sub -0.29][sup+0.33][+-] 0.10) x 10[sup -6], where the uncertainties are statistical and systematic, respectively. The significance of the B[yields] K[ell][sup+][ell][sup -] signal is over 8[sigma], while for B[yields] K*[ell][sup+][ell][sup -] it is 3.3[sigma].

Download or read book Government Reports Annual Index written by and published by . This book was released on 1995 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Download or read book Histoire de derniere Guerre commenc e l an 1756 et finie par la Paix d Hubertsbourg le 15 Fevrier 1763 written by and published by . This book was released on 1768 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Search for the Rare Decays B Kl l and B K 892 l l written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results from a search for the flavor-changing neutral current decays B[yields] K[ell][sup+][ell][sup -] and B[yields] K*[ell][sup+][ell][sup -], where[ell][sup+][ell][sup -] is either an e[sup+]e[sup -] or[mu][sup+][mu][sup -] pair. The data sample comprises 22.7 x 10[sup 6][Upsilon](4S)[yields] B[bar B] decays collected with the BABAR detector at the PEP-II B Factory. We obtain the 90% C.L. upper limits[Beta](B[yields] K[ell][sup+][ell][sup -])

Download or read book Use of Services for Family Planning and Infertility United States 1982 written by Gerry E. Hendershot and published by . This book was released on 1988 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1982 statistics on the use of family planning and infertility services presented in this report are preliminary results from Cycle III of the National Survey of Family Growth (NSFG), conducted by the National Center for Health Statistics. Data were collected through personal interviews with a multistage area probability sample of 7969 women aged 15-44. A detailed series of questions was asked to obtain relatively complete estimates of the extent and type of family planning services received. Statistics on family planning services are limited to women who were able to conceive 3 years before the interview date. Overall, 79% of currently mrried nonsterile women reported using some type of family planning service during the previous 3 years. There were no statistically significant differences between white (79%), black (75%) or Hispanic (77%) wives, or between the 2 income groups. The 1982 survey questions were more comprehensive than those of earlier cycles of the survey. The annual rate of visits for family planning services in 1982 was 1077 visits /1000 women. Teenagers had the highest annual visit rate (1581/1000) of any age group for all sources of family planning services combined. Visit rates declined sharply with age from 1447 at ages 15-24 to 479 at ages 35-44. Similar declines with age also were found in the visit rates for white and black women separately. Nevertheless, the annual visit rate for black women (1334/1000) was significantly higher than that for white women (1033). The highest overall visit rate was for black women 15-19 years of age (1867/1000). Nearly 2/3 of all family planning visits were to private medical sources. Teenagers of all races had higher family planning service visit rates to clinics than to private medical sources, as did black women age 15-24. White women age 20 and older had higher visit rates to private medical services than to clinics. Never married women had higher visit rates to clinics than currently or formerly married women. Data were also collected in 1982 on use of medical services for infertility by women who had difficulty in conceiving or carrying a pregnancy to term. About 1 million ever married women had 1 or more infertility visits in the 12 months before the interview. During the 3 years before interview, about 1.9 million women had infertility visits. For all ever married women, as well as for white and black women separately, infertility services were more likely to be secured from private medical sources than from clinics. The survey design, reliability of the estimates and the terms used are explained in the technical notes.

Download or read book Search for the Rare Decay B s 0 to mu mu at written by and published by . This book was released on 2013 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurements of the Rare Decays B Kl l and B K l l written by J. C. Chen and published by . This book was released on 2005 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present measurements of the flavor-changing neutral current decays B {yields} K{ell}{sup +}{ell}{sup -} and B {yields} K*{ell}{sup +}{ell}{sup -}, where {ell}{sup +}{ell}{sup -} is either an e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} pair. The data sample comprises 229 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring.

Download or read book Search for Rare Decays of the K written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on a search for the rare decays K/sub L/° .-->. .mu./sup +-/e/sup /minus plus//, K/sub L/° .-->. ee/sup /minus//, and K/sub L/° .-->. .pi.°ee/sup /minus// at the Brookhaven AGS. Limits obtained for these processes are BR(K/sub L/° .-->. .mu./sup +-/e/sup /minus plus//) 1.9 x 10/sup /minus/9/, BR(K/sub L/° .--. e+e/sup /minus//) 1.2 x 10/sup /minus/9/, and BR(K/sub L/° .--. .pi.°e+e/sup /minus//)

Download or read book A Combination of CDF and D0 Limits on the Branching Ratio of B0 s d Mu Mu Decays written by C. J. Lin and published by . This book was released on 2005 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors combine the results of CDF and D0 searches for the rare decays B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} and B{sub d}{sup 0} {yields} {mu}{sup +}{mu}{sup -}. The experiments use 364 pb{sup -1} and 300 pb{sup -1} of data respectively. The limits on the branching ratios are obtained by normalizing the estimated sensitivity to the decay B{sup +} {yields} J/{psi}K{sup +} taking into account the fragmentation ratios f{sub u}/f{sub s(d)}. The combined results exclude branching ratios of BR(B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -})> 1.5 x 10{sup -7} and BR(B{sub d}{sup 0} {yields} {mu}{sup +}{mu}{sup -})> 4.0 x 10{sup -8} at 95% confidence level. These are the most stringent limits on these decays at the present time.