A particle with negative charge \(-q\) moves with constant speed \(v\) in a region containing a uniform magnetic field of magnitude \(B\). The velocity vector of the particle makes a constant angle \(\theta\) (where \(0^\circ < \theta < 90^\circ\)) with the magnetic field lines, causing the particle to execute a helical path. If the magnitude of the magnetic field \(B\) is increased while keeping \(v\) and \(\theta\) constant, how do the radius of the helical path and its pitch (the distance traveled parallel to the magnetic field per revolution) change?