104,738 research outputs found
Search for D-0 -> gamma gamma and improved measurement of the branching fraction for D-0 -> pi(0)pi(0)
No full textÇetin, Serkant Ali (Dogus Author)Using 2.92 fb(-1) of electron-positron annihilation data collected at root s = 3.773 GeV with the BESIII detector, we report the results of a search for the flavor-changing neutral current process D-0 -> gamma gamma using a double-tag technique. We find no signal and set an upper limit at 90% confidence level for the branching fraction of B(D-0 -> gamma gamma pi(0)pi(0)) = (8.24 +/- 0.21(stat) +/- 0.30(syst)) x 10(-4), the most precise measurement to date and consistent with the current world average
1ST MEASUREMENT OF GAMMA(D(S)(+)-]MU+NU)/GAMMA(D(S)(+)-]PHI-PI+)
No full textComplete Author List:
ACOSTA D, ATHANAS M, MASEK G, PAAR H, BEAN A, GRONBERG J, KUTSCHKE R, MENARY S, MORRISON RJ, NAKANISHI S, NELSON HN, NELSON TK, RICHMAN JD, RYD A, TAJIMA H, SCHMIDT D, SPERKA D, WITHERELL MS, PROCARIO M, YANG S, BALEST R, CHO K, DAOUDI M, FORD WT, JOHNSON DR, LINGEL K, LOHNER M, RANKIN P, SMITH JG, ALEXANDER JP, BEBEK C, BERKELMAN K, BESSON D, BROWDER TE, CASSEL DG, CHO HA, COFFMAN DM, DRELL PS, EHRLICH R, GALIK RS, GARCIASCIVERES M, GEISER B, GITTELMAN B, GRAY SW, HARTILL DL, HELTSLEY BK, JONES CD, JONES SL, KANDASWAMY J, KATAYAMA N, KIM PC, KREINICK DL, LUDWIG GS, MASUI J, MEVISSEN J, MISTRY NB, NG CR, NORDBERG E, OGG M, PATTERSON JR, PETERSON D, RILEY D, SALMAN S, SAPPER M, WORDEN H, WURTHWEIN F, AVERY P, FREYBERGER A, RODRIGUEZ J, STEPHENS R, YELTON J, CINABRO D, HENDERSON S, KINOSHITA K, LIU T, SAULNIER M, SHEN F, WILSON R, YAMAMOTO H, ONG B, SELEN M, SADOFF AJ, AMMAR R, BALL S, BARINGER P, COPPAGE D, COPTY N, DAVIS R, HANCOCK N, KELLY M, KWAK N, LAM H, KUBOTA Y, LATTERY M, NELSON JK, PATTON S, PERTICONE D, POLING R, SAVINOV V, SCHRENK S, WANG R, ALAM MS, KIM IJ, NEMATI B, ONEILL JJ, SEVERINI H, SUN CR, ZOELLER MM, CRAWFORD G, DAUBENMIER CM, FULTON R, FUJINO D, GAN KK, HONSCHEID K, KAGAN H, KASS R, LEE J, MALCHOW R, MORROW F, SKOVPEN Y, SUNG M, WHITE C, WHITMORE J, WILSON P, BUTLER F, FU X, KALBFLEISCH G, LAMBRECHT M, ROSS WR, SKUBIC P, SNOW J, WANG PL, WOOD M, BORTOLETTO D, BROWN DN, FAST J, MCILWAIN RL, MIAO T, MILLER DH, MODESITT M, SCHAFFNER SF, SHIBATA EI, SHIPSEY IPJ, WANG PN, BATTLE M, ERNST J, KROHA H, ROBERTS S, SPARKS K, THORNDIKE EH, WANG CH, DOMINICK J, SANGHERA S, SHELKOV V, SKWARNICKI T, STROYNOWSKI R, VOLOBOUEV I, ZADOROZHNY P, ARTUSO M, HE D, GOLDBERG M, HORWITZ N, KENNETT R, MONETI GC, MUHEIM F, MUKHIN Y, PLAYFER S, ROZEN Y, STONE S, THULASIDAS M, VASSEUR G, ZHU G, BARTELT J, CSORNA SE, EGYED Z, JAIN V, SHELDON P, AKERIB DS, BARISH B, CHADHA M, CHAN S, COWEN DF, EIGEN G, MILLER JS, OGRADY C, URHEIM J, WEINSTEIN A
Precision measurement of the D*(0) decay branching fractions
No full textÇetin, Serkant Ali (Dogus Author)Using 482 pb(-1) of data taken at root s = 4.009 GeV, we measure the branching fractions of the decays of D*(0) into D-0 pi(0) and D-0 gamma to be B(D*(0) -> D-0 pi(0)) = (65.5 +/- 0.8 +/- 0.5)% and B(D*(0) -> D0 gamma) = (34.5 +/- 0.8 +/- 0.5)%, respectively, by assuming that the D*(0) decays only into these two modes. The ratio of the two branching fractions is B(D*(0) -> D-0 pi(0))/B(D*(0) -> D-0 gamma) = 1.90 +/- 0.07 +/- 0.05, which is independent of the assumption made above. The first uncertainties are statistical and the second ones systematic. The precision is improved by a factor of 3 compared to the present world average values
First observations of B̅[0 over s]→D[superscript +]D[superscript -], D[+ over s]D[superscript -] and D[superscript 0]D̅[superscript 0] decays
No full textFirst observations and measurements of the branching fractions of the B̅[0 over s]→D[superscript +]D[superscript -], B̅[0 over s]→D[+ over s]D[superscript -] and B̅[0 over s]→D[superscript 0]D̅[superscript 0] decays are presented using 1.0 fb[superscript -1] of data collected by the LHCb experiment. These branching fractions are normalized to those of B̅[superscript 0]→D[superscript +]D[superscript -], B[superscript 0]→D[superscript -]D[+ over s] and B[superscript -]→D[superscript 0]D[- over s], respectively. An excess of events consistent with the decay B̅[superscript 0]→D[superscript 0]D̅[superscript 0] is also seen, and its branching fraction is measured relative to that of B[superscript -]→D[superscript 0]D[- over s]. Improved measurements of the branching fractions B(B̅[0 over s]→D[+ over s]D[- over s]) and B(B[superscript -]→D[superscript 0]D[- over s]) are reported, each relative to B(B[superscript 0]→D[superscript -]D[+ over s]). The ratios of branching fractions are B(B̅[0 over s]→D[superscript +]D[superscript -])/B(B̅[superscript 0]→D[superscript +]D[superscript -])=1.08±0.20±0.10, B(B̅[0 over s]→D[+ over s]D[superscript -])/B(B[superscript 0]→D[superscript -]D[+ over s])=0.050±0.008±0.004, B(B̅[0 over s]→D[superscript 0]D̅[superscript 0])/B(B[superscript -]→D[superscript 0]D[- over s])=0.019±0.003±0.003, B(B̅[superscript 0]→D[superscript 0]D̅[superscript 0])/B(B[superscript -]→D[superscript 0]D[- over s])<0.0024 at 90% CL, B(B̅[0 over s]→D[+ over s]D[- over s])/B(B[superscript 0]→D[superscript -]D[+ over s])=0.56±0.03±0.04, B(B[superscript -]→D[superscript 0]D[- over s])/B(B[superscript 0]→D[superscript -]D[+ over s])=1.22±0.02±0.07, where the uncertainties are statistical and systematic, respectively.National Science Foundation (U.S.
Ali Yaşar Sarıbay (1952 - …)
No full textAli Yaşar Sarıbay was searched in this study. He is one of the most important social scientist in contemporary Turkey. A critical literature review accomplished on the first stage. Following this, a rather detailed interview schedule with mostly open-ended (unstructured) questions were prepared. And than, a very successful and productive face to face interview was realised with the author.Bu çalışmada, Türkiye’nin en önemli yaşayan siyaset sosyologlarından biri olan Ali Yaşar Sarıbay konu edildi. Yaşayan bilim - düşün insanlarını konu edinen araştırmanın zorlukları bu alanda çalışan herkesçe bilinir. Araştırmada, bu zorlukların yaratabileceği sorunları en aza indirgeyebilmek için analitik bir bakış açısından ziyade betimleyici bir tutum tercih edildi.Bu amaç doğrultusunda önce hem elektronik hem de matbu ortamlarda geniş bir literatür taraması yapıldı. Ardından Prof. Dr. Ali Yaşar Sarıbay’ın, ulaşılabilen bütün eserleri okundu. Derlenen bilgilerden yola çıkılarak oldukça ayrıntılı bir görüşme kılavuzu hazırlandı. Bunları müteakiben Ali Yaşar Sarıbay Hoca ile yüz yüze, saatler süren bir mülakat gerçekleştirildi. Araştırmanın temel veri kaynağını bu görüşmede elde edilen bilgiler oluşturdu
Measurement of the Born cross sections for e(+)e(-) -> D-s(+) D-s1 (2460)(-) +c.c. and e(+) e(-) -> D-s*(+) D-s1 (2460)(-)( )+ c.c.
No full text11 pagesThe processes e(+)e(-) -> D-s(+) D-s1 (2460)(-) + c.c. and e(+) e(-) -> D-s*(+) D-s1 (2460)(-)+ c.c. are studied for the first time using data samples collected with the BESIII detector at the BEPCII collider. The Born cross sections of e(+)e(-) -> D-s(+) D-s1 (2460)(-) + c.c. at nine center-of-mass energies between 4.467 GeV and 4.600 GeV and those of e(+) e(-) -> D-s*(+) D-s1 (2460)(-)+ c.c. at root s = 4.590 GeV and 4.600 GeV are measured. No obvious charmonium or charmoniumlike structure is seen in the measured cross sections
ali-ment-azione - collezione di prodotti di social design
No full text[ali-ment-azione] è un marchio registrato, logotipo della collezione di prodotti di social design per educare (e-ducere) alla sana alimentazione dei cinque sensi più uno, il buon senso. I tre ingredienti necessari per una sana alimentazione sono infatti: le ALI componente creativa, immateriale fatta di memoria, ricordi, emozioni, odori; la MENTE che rende consapevoli di ciò che mangiamo con la bocca, il naso, gli occhi, le orecchie, le mani; AZIONE ingrediente modale, comportamentale
Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e)
No full textBy analyzing 482 pb(-1) of e(+)e(-) collision data collected at root s = 4.009 GeV with the BESIII detector at the BEPCII collider, we measure the absolute branching fractions for the semileptonic decays D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e) to be B(D-s(+) -> eta e(+)nu(e)) = (2.30 +/- 0.31 +/- 0.08)% and B(D-s(+) -> eta ' e(+)nu(e)) = (0.93 +/- 0.30 +/- 0.05)%, respectively, and their ratio B(D-s(+) -> eta ' e(+)nu(e)) / B(D-s(+) -> eta ' e(+)nu(e)) = 0.40 +/- 0.14 +/- 0.02, where the first uncertainties are statistical and the second ones are systematic. The results are in good agreement with previous measurements within uncertainties; they can be used to determine the eta-eta' mixing angle and improve upon the D-s(+) semileptonic branching ratio precision
Confirmation of a charged charmoniumlike state Zc (3885)∓ in e+e- →π± (D D ¯ ∗)∓ with double D tag
No full textÇetin, Serkant Ali (Dogus Author)We present a study of the process e+e-→π±(DD¯∗)∓ using data samples of 1092 pb-1 at s=4.23 GeV and 826 pb-1 at s=4.26 GeV collected with the BESIII detector at the BEPCII storage ring. With full reconstruction of the D meson pair and the bachelor π± in the final state, we confirm the existence of the charged structure Zc(3885)∓ in the (DD¯∗)∓ system in the two isospin processes e+e-→π+D0D∗- and e+e-→π+D-D∗0. By performing a simultaneous fit, the statistical significance of Zc(3885)∓ signal is determined to be greater than 10σ, and its pole mass and width are measured to be Mpole=(3881.7±1.6(stat)±1.6(syst)) MeV/c2 and Γpole=(26.6±2.0(stat)±2.1(syst)) MeV, respectively. The Born cross section times the (DD¯∗)∓ branching fraction (σ(e+e-→π±Zc(3885)∓)×Br(Zc(3885)∓→(DD¯∗)∓)) is measured to be (141.6±7.9(stat)±12.3(syst)) pb at s=4.23 GeV and (108.4±6.9(stat)±8.8(syst)) pb at s=4.26 GeV. The polar angular distribution of the π±-Zc(3885)∓ system is consistent with the expectation of a quantum number assignment of JP=1+ for Zc(3885)∓
Measurement of the form factors in the decay D+ →ωe+νe and search for the decay D+ →φe+νe
No full textÇetin, Serkant Ali (Dogus Author)Using 2.92fb-1 of electron-positron annihilation data collected at a center-of-mass energy of s=3.773GeV with the BESIII detector, we present an improved measurement of the branching fraction B(D+→ωe+νe)=(1.63±0.11±0.08)×10-3. The parameters defining the corresponding hadronic form factor ratios at zero momentum transfer are determined for the first time; we measure them to be rV=1.24±0.09±0.06 and r2=1.06±0.15±0.05. The first and second uncertainties are statistical and systematic, respectively. We also search for the decay D+→φe+νe. An improved upper limit B(D+→φe+νe)<1.3×10-5 is set at 90% confidence level
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