Download or read book Search for The Lambda Sub B Baryon at CDF written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The?{sub b} baryon has been observed recently by UA1 through its decay?{sub b} → J/??°. Although CDF finds twice as many J/? and observes?° decays, no evidence for an?{sub b} signal is seen. The UA1 data supports a lower than expected production P{sub T} for the?{sub b}, and therefore, a lower pion P{sub T}, below the observation threshold of CDF. This result suggests that UA1 and CDF are probably not inconsistent, but also that the production models are not quite right.

Download or read book Heavy Gauge Boson And Lambda Sub B Baryon Searches at CDF written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have searched for new gauge bosons (W′→ lv, Z′ → ll) and b baryons (?{sub b} →??°) in p{bar p} collisions at √s = 1.8 TeV from the 1988--1989 run of the Collider Detector at Fermilab (CDF). We present 95% confidence level (C.L.) limits on the W′ and Z′ production cross section in leptonic decay modes. The nonobservation of these processes leads to limits of M{sub w{prime}}> 520 GeV/c2 and M{sub z{prime}}> 412 GeV/c2 (95% C.L.), assuming Standard Model coupling strengths. We see no evidence for the signal (?{sub b} →??°) in our? sample (? →??) around the?{sub b} mass region of 5600 MeV. We set an upper limit on F(?{sub b})Br(?{sub b} →??°) of 0.55 × 10−3 (90% C.L.), assuming that b baryons and mesons are produced in the fragmentation process in similar ways. The CDF Ai, search is also reported in the QCD session of this conference. This paper summarizes our result briefly; the details can be found in the other talk.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Lambda Sub B Results from CDF written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The CDF experiment has recorded 110 pb[sup[minus]1] of p[ovr p] collisions at[radical]s= 1.8 TeV during the 1992-1995 data taking period. Using this dataset, searches for inclusive and semileptonic[Lambda][sub b] decays were performed. The[Lambda][sub b] mass was measured to be M[sub[Lambda][sub b]][equals] 5623[plus-minus] 5(stat.)[plus-minus] 4(syst.) MeV/c[sup 2], using a sample of exclusively reconstructed[Lambda][sub b] candidate events in the[Lambda][sub b][r-arrow][Lambda]J/[psi] channel. The[Lambda][sub b] lifetime was measured to be[tau][sub[Lambda][sub b]][equals] 1. 32[plus-minus] 0.08(stat.)[plus-minus] 0.05(syst.) ps, using a sample of 197[plus-minus] 25 partially reconstructed semileptonic[Lambda][sub b][r-arrow] l[sup[minus]][Lambda][sub c][sup[plus]]X decays, with[Lambda][sub c][sup[plus]] reconstructed from its decay to the pK[sup[minus]][pi][sup[plus]] final state. Using the same decay channels, the product branching ratios were measured to be f(b[r-arrow][Lambda][sub b])B([Lambda][sub b][r-arrow][Lambda]J/[psi])= 4.2[plus-minus]1.8(stat.)[plus-minus]0.7(syst.)[times]10[sup[minus]5] and f(b[r-arrow][Lambda][sub b])B([Lambda][sub b][r-arrow] l[sup[minus]][Lambda][sub c][sup[plus]][ovr[nu]])B([Lambda][sub c][sup[plus]][r-arrow] pK[sup[minus]][pi][sup[plus]])[equals] 9.3[plus-minus]2.5(stat.)[plus-minus][sup[plus]4.6][sub[minus]4.0](syst.)[times]10[sup[minus]4], where f(b[r-arrow][Lambda][sub b]) is the fraction of b quarks forming b baryons, and l is either an electron or a muon. 15 refs., 4 figs., 1 tab.

Download or read book First Observation of Bottom Baryon Sigma b States at CDF written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the latest results on the search for bottom baryon states [Sigma]{sub b} using ≈ 1 fb−1 of CDF data. The study is performed with the world's largest sample of fully reconstructed [Lambda]{sub b}° decays collected by CDF II detector at √s = 1.96TeV in the hadronic trigger path. We observe 4 new states consistent with [Sigma]{sub b}{sup (*){+-}} bottom baryons.

Download or read book Search for the sub B Baryon at CDF written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of B Baryons with the CDF II Detector written by and published by . This book was released on 2007 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the observation of new bottom baryon states. The most recent result is the observation of the baryon [Xi]{sub b}− through the decay [Xi]{sub b}− → J/[psi][Xi]−. The significance of the signal corresponds to 7.7[sigma] and the [Xi]{sub b}− mass is measured to be 5792.9±2.5(stat.)±1.7(syst.) MeV/c2. In addition we observe four resonances in the [Lambda]{sub b}°[pi]{sup {+-}} spectra, consistent with the bottom baryons [Sigma]{sub b}{sup (*){+-}}. All observations are in agreement with theoretical expectations.

Download or read book Search for Decays of the Lambda B Baryon written by and published by . This book was released on 2011 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heavy Gauge Boson and sub B Baryon Searches at CDF written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evidence for the Bottom Baryon Resonance State Lambda 0 b with the CDF II Detector written by and published by . This book was released on 2013 with total page 7 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 1993 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evidence for a Bottom Baryon Resonance Lambda b in CDF Data written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Energy Physics Index written by and published by . This book was released on 1994 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Communicated Abstracts for the Sixteenth International Congress of the International Union of Crystallography Beijing China 21 29 August 1993 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beauty Baryons Recent CDF Results written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using data collected between 1992 and 1995 at the Fermilab Tevatron, CDF has searched for the[Lambda][sub b] baryon through both semileptonic and hadronic decay channels. This presentation reviews measurements of the[Lambda][sub b] mass, lifetime, and production and decay rates performed with this data.

Download or read book Letters and Notes Concerning the Honeywell Hunnewell Family of Philadelphia Pa and Maryland written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: