29,440 research outputs found
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
First observation of the decay Bs0→K*0K*0
No full textThe first observation of the decay B0s→K∗0K∗0 is reported using 35 pb−1 of data collected by LHCb in proton–proton collisions at a centre-of-mass energy of 7 TeV. A total of 49.8±7.5 B0s→(K+π−)(K−π+) events are observed within ±50 MeV/c2 of the B0s mass and 746 MeV/c2 < mKπ < 1046 MeV/c2, mostly coming from a resonant B0s→K∗0K∗0 signal. The branching fraction and the CP-averaged K∗0 longitudinal polarization fraction are measured to be B(B0s→K∗0K∗0)=(2.81±0.46(stat.)±0.45(syst.)±0.34(fs/ fd))×10−5 and fL =0.31±0.12(stat.)±0.04(syst.)
Observation of the suppressed ADS modes B± → [π±K-/+ π+π-]D K± and B± → [π± K-/+π+π-]Dπ±
No full textAn analysis of and B± → DK± and B± → Dπ±
decays is presented where the D meson is reconstructed in the four-body final state K± π-/+π+π-. Using LHCb data corresponding to an integrated luminosity of 1.0 fb-1, first observations are made of the suppressed ADS modes B± →[π± K-/+π+π-]DK± and B± → [π± K-/+π+π-]Dπ± with a significance of 5.1 sigma and greater than 10 sigma, respectively. Measurements of CP asymmetries and CP-conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured B± → DK ± amplitudes is determined to be rKB = 0.097 ± 0.011
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
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
Author Correction: COVID-19 vaccine guidance for patients with cancer participating in oncology clinical trials
No full textIn the original version of this Perspective, the name of the author Giuseppe Curigliano was incorrectly written as Guiseppe Curigiliano. The affiliations have been corrected in the HTML and PDF versions of the manuscrip
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
K-theory for group C*-algebras
No full textThese notes are based on a lecture course given by the first author in the Sedano Winter School on K-theory held in Sedano, Spain, on January 22-27th of 2007. They aim at introducing K-theory of C*-algebras, equivariant K-homology and KK-theory in the context of the Baum-Connes conjectur
The book of author about walking
No full textAutorská kniha na téma chůze předává mou osobní výpověď skrze texty a ilustrace. Představuje čtenáři pohled na chůzi jako prostředek k meditaci a k uvědomění. Vede ho k žití v přítomnosti a k všímavosti k sobě i okolí, především ke krásám přírody a jejím proměnám.ObhájenoThe book of author about walking contains my personal statement through texts and illustrations. It presents walking as a way of meditation and mindfulness. It leads to live in the present and to be attentive to ourselves and our surroundings, especially to the beauties of nature and its changes
Project management of the festival Náplavka k světu.
No full textTato bakalářská práce se zabývá realizací projektu Náplavka k světu., jehož cílem je zpřístupnění a oživení břehu řeky Radbuzy uprostřed historického centra města Plzně. V současné době je náplavka veřejnosti nepřístupná, plochy nejsou upravovány a ze strany vedení města Plzně nevedou žádné podpůrné kroky k vybudování trvalé centrální náplavky. V červnu 2014 se konal první ročník festivalu Náplavka k světu., prostřednictvím kterého se organizátor snaží poukázat na potenciál této plochy a vzbudit tak zájem širší veřejnosti o její trvalé využívání. Cílem práce je za pomoci smíšených výzkumných metod - rozhovorů a dotazníku, popsat a následně evaluovat průběh realizace projektu. Metody a postupy realizačního týmu jsou v práci konfrontovány s metodikou projektového managementu, která je obsahem teoretické části. V závěru práce autorka navrhuje zefektivňující opatření pro řízení projektu, která mohou sloužit jako inspirace organizačnímu týmu v následujících ročnících festivalu.This bachelor thesis deals with the implementation of the project Náplavka k světu. whose aim is to animate and open the bank of the Radbuza river in Pilsen to the public. Currently this place in inaccessible, the surface is not maintained and there aren't any supporting steps from the leadership of Pilsen towards the construction of the permanent embankment. The first year of the festival Náplavka k světu. was held in June 2014. Through this event the organizer tries to show the potential of the area and to arouse the interest of the wider public about its permanent use. Thesis aim is to describe and subsequently evaluate the progress of the project realization thanks to the mixed research methods -- interview and a questionnaire. Methods and procedures followed by the project team are confronted with the methodology of project management, which is contained in the theoretical part. In conclusion, the author proposes measures to increase the effectiveness of the project management that can serve as an inspiration for the future organizational of the festival
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