2,397 research outputs found
Inclusive decays B->DX and B->D*X
No full textComplete Author List: Gibbons L, Johnson SD, Kwon Y, Roberts S, Thorndike EH, Jessop CP, Lingel K, Marsiske H, Perl ML, Schaffner SF, Ugolini D, Wang R, Zhou X, Coan TE, Fadeyev V, Korolkov I, Maravin Y, Narsky I, Shelkov V, Staeck J, Stroynowski R, Volobouev I, Ye J, Artuso M, Efimov A, Frasconi F, Gao M, Goldberg M, He D, Kopp S, Horwitz N, Moneti GC, Mountain R, Mukhin Y, Schuh S, Skwarnicki T, Stone S, Thulasidas M, Viehhauser G, Xing X, Bartelt J, Csorna SE, Jain V, Marka S, Freyberger A, Godang R, Kinoshita K, Lai IC, Pomianowski P, Schrenk S, Bonvicini G, Cinabro D, Greene R, Perera LP, Barish B, Chadha M, Chan S, Eigen G, Miller JS, OGrady C, Schmidtler M, Urheim J, Weinstein AJ, Wurthwein F, Asner DM, Bliss DW, Brower WS, Masek G, Paar HP, Sharma V, Gronberg J, Kutschke R, Lange DJ, Menary S, Morrison RJ, Nelson HN, Nelson TK, Qiao C, Richman JD, Roberts D, Ryd A, Witherell MS, Balest R, Behrens BH, Cho K, Ford WT, Park H, Rankin P, Roy J, Smith JG, Alexander JP, Bebek C, Berger BE, Berkelman K, Bloom K, Cassel DG, Cho HA, Coffman DM, Crowcroft DS, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Elia R, Foland AD, Gaidarev P, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Kandaswamy J, Katayama N, Kim PC, Kreinick DL, Lee T, Liu Y, Ludwig GS, Masui J, Mevissen J, Mistry NB, Ng CR, Nordberg E, Ogg M, Patterson JR, Peterson D, Riley D, Soffer A, Ward C, Athanas M, Avery P, Jones CD, Lohner M, Prescott C, Yang S, Yelton J, Zheng J, Brandenburg G, Briere RA, Gao YS, Kim DYJ, Wilson R, Yamamoto H, Browder TE, Li F, Li Y, Rodriguez JL, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Selen M, Thaler JJ, Edwards KW, Bellerive A, Janicek R, MacFarlane DB, McLean KW, Patel PM, Sadoff AJ, Ammar R, Baringer P, Bean A, Besson D, Coppage D, Darling C, Davis R, Hancock N, Kotov S, Kravchenko I, Kwak N, Anderson S, Kubota Y, Lattery M, ONeill JJ, Patton S, Poling R, Riehle T, Savinov V, Smith A, Alam MS, Athar SB, Ling Z, Mahmood AH, Severini H, Timm S, Wappler F, Anastassov A, Blinov S, Duboscq JE, Fisher KD, Fujino D, Fulton R, Gan KK, Hart T, Honscheid K, Kagan H, Kass R, Lee J, Spencer MB, Sung M, Undrus A, Wanke R, Wolf A, Zoeller MM, Nemati B, Richichi SJ, Ross WR, Skubic P, Wood M, Bishai M, Fast J, Gerndt E, Hinson JW, Menon N, Miller DH, Shibata EI, Shipsey IPJ, Yurko M</p
Measurement of mixing and CP violation parameters in two-body charm decays
No full textA study of mixing and indirect CP violation in D 0 mesons through the determination of the parameters y CP and A Γ is presented. The parameter y CP is the deviation from unity of the ratio of effective lifetimes measured in D 0 decays to the CP eigenstate K + K − with respect to decays to the Cabibbo favoured mode K −π+. The result measured using data collected by LHCb in 2010, corresponding to an integrated luminosity of 29 pb−1, is y CP = (5.5 ± 6.3stat ± 4.1syst) × 10−3. The parameter A Γ is the asymmetry of effective lifetimes measured in decays of D 0 and D0 mesons to K + K −. The result is A Γ = (−5.9 ± 5.9stat ± 2.1syst) × 10−3. A data-driven technique is used to correct for lifetime-biasing effects
New Limits for Neutrinoless Tau Decays
No full textNeutrinoless 3-prong tau lepton decays into a charged lepton and either two charged particles or one neutral meson have been searched for using 4.79 fb \Gamma1 of data collected with the CLEO II detector at CESR. This analysis represents an update of a previous study and the addition of six decay channels. In all channels the numbers of events found are compatible with background estimates and branching fraction upper limits are set for 28 different decay modes. These limits are either more stringent than those set previously or represent the first attempt to find these decays. PACS numbers: 13.35.Dx, 14.60.Fg Typeset using REVT E X D. W. Bliss, 1 G. Masek, 1 H. P. Paar, 1 S. Prell, 1 V. Sharma, 1 D. M. Asner, 2 J. Gronberg, 2 T. S. Hill, 2 D. J. Lange, 2 R. J. Morrison, 2 H. N. Nelson, 2 T. K. Nelson, 2 D. Roberts, 2 A. Ryd, 2 R. Balest, 3 B. H. Behrens, 3 W. T. Ford, 3 H. Park, 3 J. Roy, 3 J. G. Smith, 3 J. P. Alexander, 4 R. Baker, 4 C..
Area-based vs tree-centric approaches to mapping forest carbon in Southeast Asian forests from airborne laser scanning data
No full textTropical forests are a key component of the global carbon cycle, and mapping their carbon density is essential for understanding human influences on climate and for ecosystem-service-based payments for forest protection. Discrete-return airborne laser scanning (ALS) is increasingly recognised as a high-quality technology for mapping tropical forest carbon, because it generates 3D point clouds of forest structure from which aboveground carbon density (ACD) can be estimated. Area-based models are state of the art when it comes to estimating ACD from ALS data, but discard tree-level information contained within the ALS point cloud. This paper compares area-based and tree-centric models for estimating ACD in lowland old-growth forests in Sabah, Malaysia. These forests are challenging to map because of their immense height. We compare the performance of (a) an area-based model developed by Asner and Mascaro (2014), and used primarily in the neotropics hitherto, with (b) a tree-centric approach that uses a new algorithm (itcSegment) to locate trees within the ALS canopy height model, measures their heights and crown widths, and calculates biomass from these dimensions. We find that Asner and Mascaro’s model needed regional calibration, reflecting the distinctive structure of Southeast Asian forests. We also discover that forest basal area is closely related to canopy gap fraction measured by ALS, and use this finding to refine Asner and Mascaro’s model. Finally, we show that our tree-centric approach is less accurate at estimating ACD than the best-performing area-based model (RMSE 18% vs 13%). Tree-centric modelling is appealing because it is based on summing the biomass of individual trees, but until algorithms can detect understory trees reliably and estimate biomass from crown dimensions precisely, areas-based modelling will remain the method of choice
First measurement of the CKM angle ϕ3 with B±→ D(π+π−π0) K± decays
No full textA bstract We present the first model-independent measurement of the CKM unitarity triangle angle ϕ 3 using B ± → D ( K S 0 π + π − π 0 ) K ± decays, where D indicates either a D 0 or D ¯ 0 meson. Measurements of the strong-phase difference of the D → K S 0 π + π − π 0 amplitude obtained from CLEO-c data are used as input. This analysis is based on the full Belle data set of 772 × 10 6 B B ¯ events collected at the Υ(4 S ) resonance. We obtain ϕ 3 = ( 5.7 − 8.8 + 10.2 ± 3 . 5 ± 5 . 7) ° and the suppressed amplitude ratio r B = 0 . 323 ± 0 . 147 ± 0 . 023 ± 0 . 051. Here the first uncertainty is statistical, the second is the experimental systematic, and the third is due to the precision of the strong-phase parameters measured from CLEO-c data. The 95% confidence interval on ϕ 3 is ( − 29 . 7 , 109 . 5) ° , which is consistent with the current world average
A model-independent Dalitz plot analysis of B±→DK± with D→K0Sh+h− (h=π,K) decays and constraints on the CKM angle γ
No full textA binned Dalitz plot analysis of B ±→DK ± decays, with D→KS0π+π- and D→KS0K+K-, is performed to measure the CP-violating observables x ± and y ± which are sensitive to the CKM angle γ. The analysis exploits 1.0 fb -1 of data collected by the LHCb experiment. The study makes no model-based assumption on the variation of the strong phase of the D decay amplitude over the Dalitz plot, but uses measurements of this quantity from CLEO-c as input. The values of the parameters are found to be x -=(0.0±4.3±1.5±0.6)×10 -2, y -=(2.7±5.2±0.8±2.3)×10 -2, x +=(-10.3±4.5±1.8±1.4)×10 -2 and y +=(-0.9±3.7±0.8±3.0)×10 -2. The first, second, and third uncertainties are the statistical, the experimental systematic, and the error associated with the precision of the strong-phase parameters measured at CLEO-c, respectively. These results correspond to γ=(44-38+43)°, with a second solution at γ→γ+180°, and r B=0.07±0.04, where r B is the ratio between the suppressed and favoured B decay amplitudes
Measurement of the charm-mixing parameter y C P in D 0 → K S 0 ω decays at Belle
No full textMinistry of Education, Culture, Sports, Science and Technology http://dx.doi.org/10.13039/501100001700Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691Nagoya University http://dx.doi.org/10.13039/501100004823Australian Research Council http://dx.doi.org/10.13039/501100000923Austrian Science Fund http://dx.doi.org/10.13039/501100002428National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809Chinese Academy of Sciences http://dx.doi.org/10.13039/501100002367CAS Center for Excellence in Particle Physics http://dx.doi.org/10.13039/501100015710Ministerstvo Školství, Mládeže a Tělovýchovy http://dx.doi.org/10.13039/501100001823Carl-Zeiss-Stiftung http://dx.doi.org/10.13039/100007569Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659Volkswagen Foundation http://dx.doi.org/10.13039/501100001663Department of Science and Technology, Ministry of Science and Technology http://dx.doi.org/10.13039/501100001409Istituto Nazionale di Fisica Nucleare of Italy http://dx.doi.org/10.13039/501100013168National Research Foundation of Korea http://dx.doi.org/10.13039/501100003725Korea Institute of Science and Technology Information http://dx.doi.org/10.13039/501100003708Ministerstwo Nauki i Szkolnictwa Wyższego http://dx.doi.org/10.13039/501100004569Ministry of Science and Higher Education of the Russian Federation http://dx.doi.org/10.13039/501100003443Javna Agencija za Raziskovalno Dejavnost RS http://dx.doi.org/10.13039/501100004329Ikerbasque, Basque Foundation for Science http://dx.doi.org/10.13039/501100003989Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung http://dx.doi.org/10.13039/501100001711Ministry of Education http://dx.doi.org/10.13039/100010002Ministry of Science and Technology, Taiwan http://dx.doi.org/10.13039/501100004663U.S. Department of Energy http://dx.doi.org/10.13039/100000015National Science Foundation http://dx.doi.org/10.13039/100000001Tau-Lepton Physics Research CenterKey Research Program of Frontier SciencesShanghai Pujiang ProgramExcellence Cluster UniverseRadiation Science Research InstituteForeign Large-size Research Facility Application Supporting projectGlobal Science Experimental Data Hub CenterKREONET/GLORIADNational Science Cente
Erratum: Measurement of the CKM matrix element | V c b | from B 0 → D * − ℓ + ν ℓ at Belle [Phys. Rev. D 100 , 052007 (2019)]
No full textPacific Northwest National Laboratory http://dx.doi.org/10.13039/100011661Ministry of Education, Culture, Sports, Science and Technology http://dx.doi.org/10.13039/501100001700Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691Nagoya University http://dx.doi.org/10.13039/501100004823Australian Research Council http://dx.doi.org/10.13039/501100000923Austrian Science Fund http://dx.doi.org/10.13039/501100002428National Natural Science Foundation of China http://dx.doi.org/10.13039/501100001809Chinese Academy of Sciences http://dx.doi.org/10.13039/501100002367CAS Center for Excellence in Particle Physics http://dx.doi.org/10.13039/501100015710Ministerstvo Školství, Mládeže a T?lovýchovy http://dx.doi.org/10.13039/501100001823Carl-Zeiss-Stiftung http://dx.doi.org/10.13039/100007569Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659Volkswagen Foundation http://dx.doi.org/10.13039/501100001663Department of Science and Technology, Ministry of Science and Technology, India http://dx.doi.org/10.13039/501100001409Istituto Nazionale di Fisica Nucleare Sezione di Padova http://dx.doi.org/10.13039/100015972National Research Foundation of Korea http://dx.doi.org/10.13039/501100003725Korea Institute of Science and Technology Information http://dx.doi.org/10.13039/501100003708Polish Ministry of Science and Higher Education http://dx.doi.org/10.13039/501100004569Javna Agencija za Raziskovalno Dejavnost RS http://dx.doi.org/10.13039/501100004329Ikerbasque, Basque Foundation for Science http://dx.doi.org/10.13039/501100003989Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung http://dx.doi.org/10.13039/501100001711Ministry of Science and Technology, Taiwan http://dx.doi.org/10.13039/501100004663U.S. Department of Energy http://dx.doi.org/10.13039/100000015National Science Foundation http://dx.doi.org/10.13039/100000001Environmental Molecular Sciences LaboratoryNational Institute of Informatics, and Science Information NETwork 5Tau-Lepton Physics Research CenterKey Research Program of Frontier SciencesShanghai Pujiang ProgramExcellence Cluster UniverseRadiation Science Research InstituteKREONETNational Science CenterRussian Federation Governmen
Search for tetraquark states X c c s ¯ s ¯ in D s + D s + ( D s + D s + ) final states at Belle
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