Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

'Look Like a Lady; Act Like a Man; Work Like a Dog'

The article discusses changes in "dress for success" literature, or advice on business attire, directed at U.S. women in the late 20th and early 21st centuries, seeing these changes as a reflection of changing social norms as women entered the workforce in greater numbers. Sources examined include the advice of image consultants and writers in books such as "The Women's Dress for Success Book" by John Molloy and "Looks That Work" by Janet Wallach, and articles in mainstream U.S. newspapers and periodicals.This is an author's final manuscript of an article from Dress 35 (2008): 47–67.</p