423,719 research outputs found
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
Full text linkThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Stress permutations: 3-D distinct element analysis accounts for a common phenomenon in brittle tectonics.
No full textPerformance Evaluation of Distributed-Antenna Communications Systems Using Beam-Hopping
No full textDigital beamforming (DBF) techniques are capable of improving the performance of communications systems significantly. However, if the transmitted signals are conflicted with strong interference, especially, in the direction of the transmitted beams , these directional jamming signals will severely degrade the system performance. In order to efficiently mitigate the interference of the directional jammers, in this contribution a beam-hopping (BH) communications scheme is proposed. In the proposed BH communications scheme, only one pair of the beams is used for transmission and it hops from one to the next according to an assigned BH pattern. In this contribution a range of expressions in terms of the average SINR performance have been derived, when both the uplink and downlink are considered. The average SINR performance of the proposed BH scheme and that of the conventional single-beam (SB) as well as multiple-beam (MB) assisted beam-processing schemes have been investigated. Our analysis and results show that the proposed BH scheme is capable of efficiently combating the directional jamming, with the aid of utilizing the directional gain of the beams generated by both the transmitter and the receiver. Furthermore, the BH scheme is capable of reducing the intercept probability of the communications. Therefore, the proposed BH scheme is suitable for communications, when several distributed antenna arrays are available around a mobile
Sae Wai, J. & Hu, J.-M. (2023) Twelve new species of Sonerila (Sonerileae, Melastomataceae) from Thailand. Phytotaxa 620 (2): 107-142.
No full textSae Wai, J., Hu, J.-M. (2023): Sae Wai, J. & Hu, J.-M. (2023) Twelve new species of Sonerila (Sonerileae, Melastomataceae) from Thailand. Phytotaxa 620 (2): 107-142. Phytotaxa 622 (2): 172-172, DOI: 10.11646/phytotaxa.622.2.7, URL: https://phytotaxa.mapress.com/pt/article/download/phytotaxa.622.2.7/5125
Er hu
No full text1. 古琴 / 吳文光, 1983 nov. 19 (c. 1 1/2 hr)-- 2. 二胡 / 余少華, nov. 2 1985.Detailed contents in vernacular field only.吳文光. 二胡 / 余少華.古琴: 吳文光, 卞趙如蘭 ; 二胡 : 余少華.Live recording."MASTER"--Spine label.Electronic reproduction from Rulan Chao Pian VHS collection.Spoken mainly in Chinese ; program name in English.Wu Wenguang. Er hu / Yu Shaohua.Gu qin: Wu Wenguang, Bian Zhao Rulan ; Er hu : Yu Shaohua
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
Full text linkFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Chen, M.-J., Han, Y.-R., Hu, J.-X., Liu, Y.-J. & Huang, B. (2023) Tolypocladium rhizomatum sp. nov.: an endophytic species isolated from the rhizome of Polygonatum cyrtonema. Phytotaxa 606 (3): 201-210.
No full textChen, M.-J., Han, Y.-R., Hu, J.-X., Liu, Y.-J., Huang, B. (2023): Chen, M.-J., Han, Y.-R., Hu, J.-X., Liu, Y.-J. & Huang, B. (2023) Tolypocladium rhizomatum sp. nov.: an endophytic species isolated from the rhizome of Polygonatum cyrtonema. Phytotaxa 606 (3): 201-210. Phytotaxa 607 (1): 114-114, DOI: 10.11646/phytotaxa.607.1.10, URL: http://dx.doi.org/10.11646/phytotaxa.607.1.1
Three-dimensional deformation along the rupture trace of the September 21st, 1999, Taiwan earthquake: a case study in the Kuangfu school.
No full text[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
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