A Fellow’s Progress

I joined the Burgon Society in January 2004 and contacted the Dean of Studies, Professor Bruce Christianson straight away, my proposal being for a critical study of academical dress in Germany. My intention was to investigate the history and to propose a new design, based on my findings. My second intention was to hand this in as a Fellowship submission, which if successful would be a great honour for me and would entitle me to my first hood in this country. [Excerpt]

Academical Dress in Germany: Part 1—A Historical Outline and the Development of a New System

This paper will consider the higher education sector then and now and will give a summary of the present situation as far as graduation celebrations are concerned. The documentary evidence for medieval academical dress in Germany will form the basis on which a logical system of gowns, hoods and hats for use at present-day German state universities will be proposed. The focus of this paper is on the first degree and only touches on the doctorate degree where necessary. [Excerpt]

An algorithm for calculating the Lorentz angle in silicon detectors

Future experiments will use silicon sensors in the harsh radiation environment of the LHC (Large Hadron Collider) and high magnetic fields. The drift direction of the charge carriers is affected by the Lorentz force due to the high magnetic field. Also the resulting radiation damage changes the properties of the drift. In this paper measurements of the Lorentz angle of electrons and holes before and after irradiation are reviewed and compared with a simple algorithm to compute the Lorentz angle.Comment: 13 pages, 7 figures, final version accepted by NIMA. Mainly clarifications included and slightly shortene

Lorentz angle measurements in irradiated silicon detectors between 77 K and 300 K

Future experiments are using silicon detectors in a high radiation environment and in high magnetic fields. The radiation tolerance of silicon improves by cooling it to temperatures below 180 K. At low temperatures the mobility increases, which leads to larger deflections of the charge carriers by the Lorentz force. A good knowledge of the Lorentz angle is needed for design and operation of silicon detectors. We present measurements of the Lorentz angle between 77 K and 300 K before and after irradiation with a primary beam of 21 MeV protons.Comment: 13 pages, 9 figures, submitted to ICHEP2000, Osaka, Japa

The Grizzly, November 3, 1978

Task Force Proposes Curricular Revisions: Faculty Discusses Broad Academic Changes • Computer Programs To Be Studied • Reed This Message • Liberal Education for a Modern World • Letters to the Editor • Campus Committees Graded • Springsteen Revisited • Halloween Horrors! • Annual Messiah Rehearsal • French Club Wined and Dined • GM: Looking Good For \u2779 • Soccer Trounces Widener • Founders\u27 Convocation • Harriers Cap 12-1 Season • Mermaids Anticipate Slick Season • Hockey J. V.s With No Losses • Zetans Take Intramural Football Championship • News in Brief: Egdon Heath to Rock T. G.; Forum Presents Workshop, Performance; Ursinus Appoints Band Directorhttps://digitalcommons.ursinus.edu/grizzlynews/1005/thumbnail.jp

The Grizzly, April 27, 1979

Honorary Degrees Given to Speakers: College to Graduate 272 at Commencement • Anti-nuclear Crowd Rallies at Limerick • Middle States Visitation Completed • Grosh Wins Award • Comment: Defrost Frozen Rooms; No Deans in Quad; Pay for Wismer • Letters to the Editor: Wilson Rebutted; Why APO Won; Inaccuracy; Students\u27 Fault; POD Responds; Clouser Revisited • Roving Reporter: Who Should be Ugly Man? • Security Change • Breakfast in America: Supertramp\u27s Masterwork • Wismer Eggs Never Break • Well Flung Spring Fling • Men\u27s Lacrosse Falls Hard • News in Brief: Espadas Receives Grant; College Hosts Prospectives; Zucker Premiers Composition • Paradise Lost: A Dump for All Seasons • Linksmen Victorious • Court Aces Down Foes • Marathon Men • Lacrosse Continues Winning Streak • Women\u27s Tennis Up and Down • Bears Fall to Widener • Cindermen Rip Uphttps://digitalcommons.ursinus.edu/grizzlynews/1019/thumbnail.jp

Study of Leading Hadrons in Gluon and Quark Fragmentation

The study of quark jets in e+e- reactions at LEP has demonstrated that the hadronisation process is reproduced well by the Lund string model. However, our understanding of gluon fragmentation is less complete. In this study enriched quark and gluon jet samples of different purities are selected in three-jet events from hadronic decays of the Z collected by the DELPHI experiment in the LEP runs during 1994 and 1995. The leading systems of the two kinds of jets are defined by requiring a rapidity gap and their sum of charges is studied. An excess of leading systems with total charge zero is found for gluon jets in all cases, when compared to Monte Carlo Simulations with JETSET (with and without Bose-Einstein correlations included) and ARIADNE. The corresponding leading systems of quark jets do not exhibit such an excess. The influence of the gap size and of the gluon purity on the effect is studied and a concentration of the excess of neutral leading systems at low invariant masses (<~ 2 GeV/c^2) is observed, indicating that gluon jets might have an additional hitherto undetected fragmentation mode via a two-gluon system. This could be an indication of a possible production of gluonic states as predicted by QCD.Comment: 19 pages, 6 figures, Accepted by Phys. Lett.

Determination of the b quark mass at the M_Z scale with the DELPHI detector at LEP

An experimental study of the normalized three-jet rate of b quark events with respect to light quarks events (light= \ell \equiv u,d,s) has been performed using the CAMBRIDGE and DURHAM jet algorithms. The data used were collected by the DELPHI experiment at LEP on the Z peak from 1994 to 2000. The results are found to agree with theoretical predictions treating mass corrections at next-to-leading order. Measurements of the b quark mass have also been performed for both the b pole mass: M_b and the b running mass: m_b(M_Z). Data are found to be better described when using the running mass. The measurement yields: m_b(M_Z) = 2.85 +/- 0.18 (stat) +/- 0.13 (exp) +/- 0.19 (had) +/- 0.12 (theo) GeV/c^2 for the CAMBRIDGE algorithm. This result is the most precise measurement of the b mass derived from a high energy process. When compared to other b mass determinations by experiments at lower energy scales, this value agrees with the prediction of Quantum Chromodynamics for the energy evolution of the running mass. The mass measurement is equivalent to a test of the flavour independence of the strong coupling constant with an accuracy of 7 permil.Comment: 24 pages, 10 figures, Accepted by Eur. Phys. J.

Measurement and Interpretation of Fermion-Pair Production at LEP energies above the Z Resonance

This paper presents DELPHI measurements and interpretations of cross-sections, forward-backward asymmetries, and angular distributions, for the e+e- -> ffbar process for centre-of-mass energies above the Z resonance, from sqrt(s) ~ 130 - 207 GeV at the LEP collider. The measurements are consistent with the predictions of the Standard Model and are used to study a variety of models including the S-Matrix ansatz for e+e- -> ffbar scattering and several models which include physics beyond the Standard Model: the exchange of Z' bosons, contact interactions between fermions, the exchange of gravitons in large extra dimensions and the exchange of sneutrino in R-parity violating supersymmetry.Comment: 79 pages, 16 figures, Accepted by Eur. Phys. J.

A Determination of the Centre-of-Mass Energy at LEP2 using Radiative 2-fermion Events

Using e+e- -> mu+mu-(gamma) and e+e- -> qqbar(gamma) events radiative to the Z pole, DELPHI has determined the centre-of-mass energy, sqrt{s}, using energy and momentum constraint methods. The results are expressed as deviations from the nominal LEP centre-of-mass energy, measured using other techniques. The results are found to be compatible with the LEP Energy Working Group estimates for a combination of the 1997 to 2000 data sets.Comment: 20 pages, 6 figures, Accepted by Eur. Phys. J.