23,461 research outputs found
Branching fraction and CP asymmetry of the decays B+→K0Sπ+ and B+→K0SK+
No full textAn analysis of B+ → K0
Sπ+ and B+ → K0
S K+ decays is performed with the LHCb experiment. The pp
collision data used correspond to integrated luminosities of 1 fb−1 and 2 fb−1 collected at centre-ofmass
energies of
√
s = 7 TeV and
√
s = 8 TeV, respectively. The ratio of branching fractions and the
direct CP asymmetries are measured to be B(B+ → K0
S K+
)/B(B+ → K0
Sπ+
) = 0.064 ± 0.009 (stat.) ±
0.004 (syst.), ACP(B+ → K0
Sπ+
) = −0.022 ± 0.025 (stat.) ± 0.010 (syst.) and ACP(B+ → K0
S K+
) =
−0.21 ± 0.14 (stat.) ± 0.01 (syst.). The data sample taken at
√
s = 7 TeV is used to search for
B+
c
→ K0
S K+ decays and results in the upper limit ( fc · B(B+
c
→ K0
S K+
))/( fu · B(B+ → K0
Sπ+
)) <
5.8 × 10−2 at 90% confidence level, where fc and fu denote the hadronisation fractions of a ¯b
quark
into a B+
c or a B+ meson, respectively
Measurement of the ratio of branching fractions B(B0→K∗0γ )/B(B0s→φγ ) and the directCP asymmetry inB 0→K∗0γ
No full textThe ratio of branching fractions of the radiative B decays B0→K⁎0γ and B0s→ϕγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s√=7TeV. The value obtained is
B(B0→K⁎0γ)B(B0s→ϕγ)=1.23±0.06(stat.)±0.04(syst.)±0.10(fs/fd),
where the first uncertainty is statistical, the second is the experimental systematic uncertainty and the third is associated with the ratio of fragmentation fractions fs/fd. Using the world average value for B(B0→K⁎0γ), the branching fraction B(B0s→ϕγ) is measured to be (3.5±0.4)×10−5.
The direct CP asymmetry in B0→K⁎0γ decays has also been measured with the same data and found to be
ACP(B0→K⁎0γ)=(0.8±1.7(stat.)±0.9(syst.))%.
Both measurements are the most precise to date and are in agreement with the previous experimental results and theoretical expectations
Prompt charm production in pp collisions at √<span style="text-decoration:overline">s</span>=7 TeV
No full textCharm production at the LHC in pp collisions at s√=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, D+s→ϕ(K−K+)π+, Λ+c→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb−1. Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse momentum and rapidity in the region 0<pT<8 GeV/c and 2.0<y<4.5. Theoretical predictions are compared to the measured differential cross-sections. The integrated cross-sections of the charm hadrons are computed in the above pT-y range, and their ratios are reported. A combination of the five integrated cross-section measurements gives
σ(cc¯)pT<8 GeV/c,2.0<y<4.5=1419±12(stat)±116(syst)±65(frag) μb,
where the uncertainties are statistical, systematic, and due to the fragmentation functions
Scientometric Portrait of Nobel Laureate S. Chandrasekhar
No full textScientometric analysis of the publications productivity of Nobel Laureate S. Chandrasekhar is documented
Establishment of the contemporary Slovenian author
No full textKoncept avtorja se je skozi čas spreminjal. V antiki je avtor veljal za avtoriteto, vzor in genija, v (post)strukturalizmu, ko je osrednje mesto zavzel tekst, so razglašali avtorjevo smrt, v današnjem času hiperprodukcije literature pa je ponovno obujen, njegova vloga pa korenito predrugačena: avtor s tem, ko sodeluje v promociji, književnemu delu omogoča preživetje. Avtor, ki se ne želi tržiti, na književnem trgu posledično obstane le s težavoče želi, da njegovo delo ni spregledano, mora biti viden in se zavestno uveljavljati. Prav proces uveljavljanja raziskujem tudi v svoji magistrski nalogi. Podrobneje me zanima, katere entitete omogočajo avtorjevo uveljavljanje in do kakšne mere se kot posameznik lahko zoperstavlja tržni logiki. Ker odločilno vlogo v tem procesu igrajo mediji in založbe, sem opravila intervjuje s petimi slovenskimi medijskimi uredništvi (in raziskala, na kak način izbirajo avtorje, o katerih poročajo, kako skrbijo za uravnovešenost, na kak način prestavljajo avtorje ipd.) ter s šestimi založbami (zanimalo me je, kako pristopajo k promociji, kakšni avtorji so zanje zanimivi, kako sodelujejo z mediji ipd.). Kot pomemben faktor v procesu uveljavljanja oboji omenjajo literarne nagrade, predvsem nagrado kresnik, ki jo podeljuje časnik Delo – vlogi slednje se posvečam v zadnjem poglavju. V sklepu izpostavljam dobre prakse, ki v slovenskem prostoru prispevajo k uveljavljanju še neuveljavljenih avtorjev, in podajam predloge izboljšav, do katerih bi lahko prišlo v medijih in založništvu.The concept of the author has changed over time. In antiquity, the author was considered an authority, a role model and a geniusin (post-)structuralism, when the text took centre stage, the death of the author was proclaimedin today\u27s age of the hyperproduction of literature, the author has been revived, and his/her role radically reshaped: the author, by taking part in the promotion, enables the literary work to survive. The author who does not want to market himself/herself will consequently find it difficult to stay on the literary marketif he/she wants his/her work not to be overlooked, he/she must be visible and consciously assert himself/herself. In my master’s thesis, this process of assertion has been explored. In more detail, I am interested in which entities enable the author to assert himself/herself and to what extent can he/she as an individual challenge the logic of the market. Since the media and publishing houses play a decisive role in this process, I interviewed five Slovenian media editorial offices (to find out how they choose the authors they cover, how they ensure balance, how they shift authors, etc.) and six publishing houses (to find out how they approach promotion, which authors are interesting to them, how they cooperate with the media, etc.). Both mention literary prizes as an important factor in the process of promotion, especially the kresnik prize awarded by the Delo newspaper – the role of the latter is discussed in the last chapter. In the conclusion, good practices that contribute to the promotion of non-established authors in Slovenia are highlighted and suggestions for improvements that could be made in the media and publishing are listed
Jean-Jacques Rousseau: Ethical dimension in author´s writings in context of his culture
No full textTato práce se zaměřuje na vybrané centrální filosofické pojmy autorovi filosofie v kontextu etickém a snaží se potvrdit či vyvrátit hypotézu, že autor svým přístupem redefinoval tyto, dnes již tradiční, filosofické pojmy, zejména pak ve srovnání k dobovému a diskursnímu proudu a pojetí těchto pojmů.ObhájenoThis paper focuses on chosen central concepts of author´s philosophy in context of ethics & the goal is to confirm or deny the proposition, that author redefines traditional philosophical concepts, mainly in comparison to contemporary thinking and discourse
Observations of Bºs→ψ(2S)η and Bº(s)→ψ(2S)π+π- decays
No full textFirst observations of the B0s
→ψ(2S)η, B0 →ψ(2S)π
+
π
− and B0s
→ψ(2S)π
+
π
− decays are made
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
√
s = 7 TeV. The ratios of the branching fractions
of each of the ψ(2S) modes with respect to the corresponding J/ψ decays are
B(B0s
→ψ(2S)η)
÷
B(B0s
→J/ψη)
= 0.83± 0.14 (stat)±0.12 (syst) ±0.02 (B),
;
B(B0→ψ(2S)π
+
π
−
)
÷
B(B0→J/ψπ
+
π
−
)
= 0.56± 0.07 (stat)±0.05 (syst)± 0.01 (B),
;
B(B0s
→ψ(2S)π
+
π
−
)
÷
B(B0s
→J/ψπ
+
π
−
)
= 0.34± 0.04 (stat)±0.03 (syst)± 0.01 (B),
where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the J/ψ
and ψ(2S) meson decays
On K. Mahler’s conjecture on the measure of the set of S-numbers
No full textThe abstracts (in two languages) can be found in the pdf file of the article.
Original author name(s) and title in Russian and Lithuanian:
В. Г. Спринджук. К гипотезе К. Малера о мере множества S-чисел
V. Sprindžiuk. K. Malerio hipotezės apie S-skaičių aibės mat
Orbital parameters of the multiple system EM Boo
No full text33rd International Physics Congress of the Turkish-Physical-Society (TPS) -- SEP 06-10, 2017 -- Bodrum, TURKEYEM Boo is a relatively bright (V = 8.98 mag.) and short orbital period (P similar to 2.45 days) binary star member of the multiple system WDS J14485+2445AB. There is neither photometric nor spectroscopic study of the system in the literature. In this work, we obtained spectroscopic orbital parameters of the system from new high resolution spectroscopic observations made with echelle spectrograph attached to UBT60 telescope of Akdeniz University. The spectroscopic solution yielded the values K-1 = 100.7 +/- 2.6 km/s, K-2 = 120.1 +/- 2.6 km/s and V-gamma = -14.6 +/- 3.1 km/s, and thus the mass ratio of the system q = 0.838 +/- 0.064.Turkish Phys So
Inter institutional workshop on breakwaters
No full text(1) Functional requirements for Breakwaters - Prof. K.d' Angremond (2) Development of fishery harbors in India - Mr. K. Omprakash (3) Non-rubble Breakwaters and optimisation - Prof. K.d' Angremond (4) Wave energy caisson Breakwaters - Dr. S. Neelamani (5) Partially suspended porous wall Breakwaters - Dr. J.S. Mani (6) Case studies on stability of Breakwaters - Prof. V. Sundar (7) Introduction on Ennore coal port project - Mr. L.A. Mayboom (8) Design of Breakwaters for Ennore port - Mr. R. Haggie (9) Construction of Breakwaters for Ennore port - Mr. S. PearsonHydraulic EngineeringCivil Engineering and Geoscience
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