118350375
Prospects at Future B Factories
Proceedings of CKM 2012, the 7th International Workshop on the CKM Unitarity Triangle, University of Cincinnati, USA, 28 September - 2 October 2012. 
A concise overview of the possibilities offered by high-luminosity B Factories in mixing and mixing-related CP violating processes in B decays is presented.
56098294
Review of measurements of the angles of the CKM matrix from the BaBar experiment
Experimental results on CP violation measurements in the B meson system from the BABAR experiment at the PEP-II asymmetric B Factory are reviewed.
16384620
CKM-UT Angles: Mixing And CP Violation at the B Factories
We review the experimental status of the angles of the Unitarity Triangle of the CKM matrix, as measured by the BABAR and Belle experiments. The B Factories have demonstrated since the beginning of this decade that CP violation in the B meson system is consistent with the Standard Model (SM) description in terms of the complex phase in the three-by-three Cabibbo-Kobayashi-Maskawa (CKM) matrix. With one single phase, the SM predicts clear patterns for quark mixing and CP violations, to be satisfied by all processes.
120063494
High precision limited streamer drift tubes
Abstract A tracking telescope employing six layers of Al drift tubes 50 cm long, with diameter d = 3 cm and wall thickness 500 μm, has been built and successfully operated with a 40% Ar-60% iC 4 H 10 gas mixture at atmospheric pressure. The tube cells, with a 100 μm thick CuBe wire strung along the axis, enter streamer mode operation at V = 4.6 kV, and feature full efficiency and local resolution of ≤60 μm.
109329842
Improved Particle Identification Using Cluster Counting in a Full-Length Drift Chamber Prototype
Single-cell prototype drift chambers were built at TRIUMF and tested with a ~210MeV/c beam of positrons, muons, and pions. A cluster-counting technique is implemented which improves the ability to distinguish muons and pions when combined with a traditional truncated-mean charge measurement. Several cluster-counting algorithms and equipment variations are tested, all showing significant improvement when combined with the traditional method. The results show that cluster counting is a feasible option for any particle physics experiment using drift chambers for particle identification. The technique does not require electronics with an overly high sampling rate. Optimal results are found with a signal smoothing time of ~5ns corresponding to a ~100MHz Nyquist frequency.
110466342
Performance and Aging Studies of BaBar Resistive Plate Chambers
The BaBar detector is currently operating nearly 200 Resistive Plate Chambers (RPCs), constructed as part of an upgrade of the forward endcap muon detector in 2002. Although the average RPC efficiency remains high, numerous changes in the RPC performance (increased currents and rates) have been observed. A few of the highest rate RPCs have suffered efficiency losses of more than 15%. Several types of efficiency loss have been observed. Tests with humidified gas have shown that some of the lost efficiency is recoverable. However, efficiency losses in the highest rate regions have not yet improved with humid gases.
120566615
Absorption of 10 and 13.5 GeV photons
SummaryThe absorption coefficients of photons have been measured at 10 GeV in CH2 and C, and at 13.5 GeV in Li, C, Cu and Pb. The detection system consisted of a pair spectrometer with two total absorption lead glass Čerenkov counters. A band of γ-rays of ±11% around the centre value was used. Within their experimental accuracies of (2÷5)% our results agree with the theoretical values.RiassuntoAbbiamo misurato i coefficienti di assorbimento di fotoni di 10 GeV in CH2 e C, e di fotoni di 13.5 GeV in Li, C, Cu e Pb. L’apparato rivelatore era costituito da uno spettrometro a coppie con due contatori di Čerenkov ad assorbimento totale. È stata usata una banda di raggi γ di ±11% attorno al valore centrale. Entro l’incertezza sperimentale delle misure ((2÷5)%) i nostri risultati sono in accordo con le previsioni teoriche.
121618537
SEARCH FOR NARROW RESONANCES IN THE R REGION.
120513565
Measurement of inclusive two-particle rapidity correlations at the ISR
Abstract We present data on two-particle distributions in the approximate rapidity variable η = −1n tan θ /2 for secondaries produced in proton-proton collisions at the CERN Intersecting Storage Rings (ISR). The data at centre-of-mass energies of 23 and 62 GeV show the existence of energy-independent positive, short-range correlations between secondaries within the central region. Deviations from short-range correlation exist when one (or both) of the particles is near the boundary of the available phase space. In part, such deviations are interpreted as the effect of a diffractive-like component in multiparticle production.
126286321
Observation of the Upsilon''' at CESR
124699225
Total cross-section measurement at the ISR
SummaryWe present the first results of an experiment at the CERN intersecting storage rings, which measures the total cross-section in proton-proton collisions. The equivalent laboratory momenta are 291, 496, 1068 and 1480 GeV/c. We have made a direct measurement of αT as the ratio between the total interaction rate and the machine luminosity. The present paper gives a detailed description of the experimental apparatus and of the analysis procedure. We find that αT increases by about 10% in the energy region studied.RiassuntoSi presentano i primi risultati di un esperimento agli anelli di accumulazione per protoni del CERN, che misura la sezione d'urto totale delle collisioni protone-protone. Gli impulsi equivalenti nel laboratorio sono di 291, 496, 1068 e 1480 GeV/c. Si è eseguita una misura diretta di αT come rapporto fra frequenza totale di interazione e luminosità della macchina. Questo articolo dà una descrizione dettagliata dell'apparato sperimentale e del procedimento di analisi. Si trova che αT aumenta di circa il 10% nell'intervallo di energia studiato.РезюмеМы предлагаем первые результаты эксперимента в ЦЕРНе на встречных накопительных пучках. В эксперименте проводилось измерение полного поперечного сечения в протон-протонных соударениях. Эквивалентный лабораторный импульс составляет 291, 496, 1068 и 1480 ГэВ/с. Мы провели прямое измерение αT как отношения между полной интенсивностью взаимодействия и светимостью машины. В этой работе приводится подробное описание экспериментальной аппаратуры и анализ методики. Мы обнаружили, что αT возрастает на 10% в исследованной области энергий.