In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

In one novel by this author, the title character dances with Barbra Flick while choosing not to pursue the tanner Emil Rothfuss's wife. This author of Knulp wrote about Joseph Knecht's pursuit of the role of Magister Ludi in the title intellectual game, and described a journey undertaken with Govinda in search for the Buddha in another novel. This author of The Glass Bead Game wrote about the saxophonist Pablo bringing Hermine to the Magic Theatre, causing Harry Haller to stab her. For 10 points, name this German author of Siddhartha and Steppenwolf.
Literature

An approximation of it named for Russell uses the TDS value to determine one of its parameters via the Langelier approximation, while one constant that appears in it has units of moles per kilogram to the one half power, according the Bates-Guggenheim convention. Along with Guggenheim, Scatchard and Bronsted improved upon this model by developing the SIT theory, and that model has a better fit than a modification of it named for Davies. This relationship assumes the existence of only long-range interactions, and it was extended to account for Brownian motion by Lars Onsager. It assumes that the solvent is structure-less and that the solution is dilute, and the theory behind it implies that the electrostatic potential falls off exponentially when r is greater than the atomic radius due to screening by counter ions. For 10 points, identify this equation which is used to calculate the activity coefficients, and is named for a German and a Dutch scientist. 
Science

They are formed by the Bjorken mechanism, while another method of producing them is known as [this name]-strahlung. When vacuum expectation value confers a major part of their characteristic property, a quadratic term is introduced to hZZ coupling and a quartic term is introduced into the hhh coupling. In an experiment at the Tevatron it may have decayed into a bottom quark anti-quark pair, and in another experiment, a 160 GeV particle decaying into two tau leptons may have been one of them. They are thought to have arisen due to spontaneous symmetry breaking as the universe cooled. That symmetry breaking occurs with the introduction of a namesake field, which accounts for why a photon is massless compared to the W and Z bosons. For 10 points, identify this particle, the only one from the standard model yet to be observed, which is hypothesized to impart mass to matter.

Science