384 research outputs found
On the equation grad f=M grad g
No full textJodeit, Jr., Max; Olver, Peter J.. (1990). On the equation grad f=M grad g. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/5136
First observation of Bs → J/ψf0(980) decays
No full textUsing data collected with the LHCb detector in proton–proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the system. Using a fit to the π+π− mass spectrum with interfering resonances gives . In the interval ±90 MeV around 980 MeV, corresponding to approximately two full f0 widths we also find , where in both cases the uncertainties are statistical and systematic, respectively
The Spirit of Justice
No full textEpisode notes
In this episode of the DEI Podcast, Max talks with Jemar Tisby, New York Times bestselling author and Notre Dame alum, about his latest book, The Spirit of Justice: True Stories of Faith, Race, and Resistance. Jemar’s book illuminates the often-overlooked heroes of the racial justice movement and explores how faith has deeply influenced the struggle for racial equality across both historical and contemporary contexts.
Max and Jemar delve into the crucial role of faith in civil rights and racial justice, the emergence of the Black church as a powerful space of resistance, and the evolving nature of racial injustice. They also discuss the contributions of White allies, the vital role of Black women during the civil rights era, and common misinterpretations of Dr. Martin Luther King Jr.’s legacy. Throughout their conversation, Jemar highlights the enduring power of resilience, the importance of Black representation, and how these elements continue to inspire and shape contemporary movements for justice
Measurement of the D+/- production asymmetry in 7 TeV pp collisions
No full textThe asymmetry in the production cross-section \sigma of D+/- mesons, A_P = (\sigma(D+) - \sigma(D-))/(\sigma(D+) + \sigma(D-)), is measured in bins of pseudorapidity \eta and transverse momentum p_T within the acceptance of the LHCb detector. The result is obtained with a sample of D+ -> K_S pi+ decays corresponding to an integrated luminosity of 1.0 fb^-1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0 K_S pi+ decay is negligible. No significant dependence on \eta or p_T is observed
Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays
No full textThis Letter reports a measurement of the CP violation observables SJ/ψK0S and CJ/ψK0S in the decay channel B0→J/ψK0S performed with 1.0 fb−1 of pp collisions at s√=7 TeV collected by the LHCb experiment. The fit to the data yields SJ/ψK0S=0.73±0.07(stat)±0.04(syst) and CJ/ψK0S=0.03±0.09(stat)±0.01(syst). Both values are consistent with the current world averages and within
expectations from the Standard Model
Post trade liberalization policy and institutional challenges in Latin America and the Caribbean
No full textArgentina, Chile, Colombia, Jamaica, Trinidad and Tobago, and Uruguay undertook extensive trade reform at a time of crisis, at which time institutional reform was difficult to undertake. Many of the countries had become members of the General Agreement on Tariffs and Trade (GATT) in the late 1980s and anticipated institutional reform. Only later did they reform trade policymaking institutions to bring them somewhat in line with trade policy regimes and GATT rules. These countries have all used reference prices and antidumping provisions of GATT, rather than safeguards, to provide relief from import surges. They have all tried to centralize trade policy by moving it from different agencies into a single agency. Despite liberalization, some sectors -- including automobiles, textiles and agriculture -- remain protected. Lessons the author draws from experience in these coutries: 1) the deteriorating macroeconomic situations are the main challenge to maintaining open trade policy; 2) trade policymaking must be constantly reviewed to prevent reversals, and the costs of protection must be communicated to the public at large; 3) There must be short-run measures to help domestic activities adjust to short-run price movements and alleviate pressure for protection. The danger -- such measures (unrelated to long-run price trends) can become permanent. 4) external commitments (through WTO or customs unions) can be used to discourage a return to protection; 5) extending reform (to labor and capital markets and the regulatory framework) will help maintain and extend trade liberalization. Allowing factors of production to move smoothly from one activity to another could help prevent the buildup of pressures that lead to protection; 6) an institution to consider exceptional protection should be advisory (independent of day-to-day trade policymaking), so that it works steadily, free from administrative pressures and exigencies. Requests for protection must be handled openly and transparently, with the findings subject to public scrutiny. Procedures for granting relief through safeguards and similar mechanisms must reflect all interests, including those of consumers, exporters, and users of the product; and 7) the analysis to establish injury must conform to high technical standards. The criteria to consider trade policies must reflect national interests, not those of any particular sector.Economic Theory&Research,Common Carriers Industry,Trade Policy,Environmental Economics&Policies,Payment Systems&Infrastructure,TF054105-DONOR FUNDED OPERATION ADMINISTRATION FEE INCOME AND EXPENSE ACCOUNT,Economic Theory&Research,Trade Policy,Environmental Economics&Policies,Transport and Trade Logistics
Measurement of the effective B0s→K+K− lifetime
No full textA measurement of the effective lifetime is presented using approximately 37 pb−1 of data collected by LHCb during 2010. This quantity can be used to put constraints on contributions from processes beyond the Standard Model in the meson system and is determined by two complementary approaches as
τKK=1.440±0.096 (stat)±0.008 (syst)±0.003 (model) ps
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