Race, class and gender in proletarian militancy: The Rand Revolt in comparative perspective

African Studies Seminar series. Paper presented 27 September 199

Agrarian class struggle and the South African War, 1899-1902

African Studies Seminar series. Paper presented 2 March 1987This study examines the sudden shift in the rural class struggle attendant upon the arrival of the British Army in the Transvaal during the South African, or Boer, War of 1899-1902; its foci are the war itself and (especially) its immediate aftermath, when the task of restoring landlord authority was undertaken by the new British Administration of the Transvaal. For the Boer War had been an imperialist war against a class of landowners. In fact, of all the guerrilla wars of the twentieth century, the Boer War is unique in that its guerrillas were rooted, not in a peasantry, but in an agrarian ruling class: the Boer Army whilst composed partly of Afrikaner tenant farmers, was commanded by landowners and a sizeable proportion of its rank and file were landlords as well. During the war, the British strategy came increasingly to concentrate upon destroying this class. The ferocious destruction and looting of Beer farms, livestock, crops and property; and the herding - there is no other word - of the landlord's families into concentration camps constituted an effective expropriation of the rural ruling class whose resources and command lay at the heart of the Boers ' war effort

William Macmillan and the working class

Paper presented at the Wits History Workshop: The Making of Class, 9-14 February, 198

Rural masters and urban militants in early twentieth-century South Africa

White farmers in South Africa, a landowning class that subordinated black tenants and workers, also participated in the suppression of white workers’ movements before and after the First World War. This article explores how class interest limited and then overrode the farmers’ expected ethnic and political solidarities. It focuses especially on the contradictory ways in which farmers related to the great mineworkers’ strike and rebellion of 1922. Some contemporaries expected that racial solidarity, Afrikaner nationalism, and familial links would lead landowners to side, even militarily, with the white workers. Appeals were made to farmers by both sides of the struggle in 1922, and there was some significant support for the strikers from them. But the upheaval ran counter to landowners’ interests, notably by dislocating their primary urban market at a time of severe economic difficulty. In the end, farmers rode once more into the towns against the workers

The Struggle for Legitimacy: South Africa’s Divided Labour Movement and International Labour Organisations, 1919–2019

Who could be considered a legitimate representative of South Africa’s working class, and even who constituted this class, was bitterly contested during the twentieth century. This chapter examines the struggles for international recognition by the rival constituents of South Africa’s labour movement, which was sharply divided along racial and ideological lines. Initially, the International Labour Organization and other similar bodies formed links with the white-dominated labour movement, which regarded itself as the legitimate representative of all workers in South Africa. This position was successfully contested by emerging black African trade unions who themselves, in the face of fierce repression, competed for financial support made available by various sections of the international labour movement

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Measurement of prompt open-charm production cross sections in proton-proton collisions at root s=13 TeV

The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb(-1). The differential production cross sections of the D*(+/-), D-+/-, and D-0 ((D) over bar (0)) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < p(T) < 100 GeV and vertical bar eta vertical bar < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements.Peer reviewe

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV