Research

The Princeton CMS Group

Marlow maintains an association with the High Energy Experimental group with faculty colleagues Isobel Ojalvo, Jim Olsen, and Chris Tully, who work on the  CMS Experiment at CERN's Large Hadron Collider.   

Detector Hardware

Detector development is a key activity of the Princeton CMS group.

CMS
Experience with detector hardware is an important part of any graduate education. The Princeton Elementary Particles (EP) group has a long tradition of providing opportunities for students to take on hardware projects.

The Princeton group owns or has access to a variety of state-of-the-art facilities including a modern machine shop, a well equipped electronics shop, and microfabrication facilities.

Shown to the right is a recently completed 10,000 class clean room, which houses a Kulicke and Soffa (K&S) Model 1478 full automatic wire bonder, a K&S 4523 deep access wedge bonder, and a K&S 1488 Turbo fully automatic Au ball bonder.

In addition, the group owns a variety of other tools useful for the fabrication and assembly of semiconductor detectors.    Its facilties are shared with other groups in the department (CMB and CM), which means that several students are knowledgable about the various tools.

HEP Clean Room
KS1478
The Kulicke and Soffa 1478 fully automatic wire bonder shown to the left has a bonding area of 500 x 500 mm2 and operates at a rate of 3 wires per second. Registration is performed using sophisticated pattern recognition.

CMS Detector Upgrade

The Princeton group has been involved in preparation for the production of modules for the upgraded CMS silicon outer tracker, which is being designed to accommodate the increase luminosity from the High-Luminosity LHC accelerator.   Details about the tracker can be found in the CMS Outer Tracker Technical Design Report.    A collection 2S modules and their  support structure is shown in the right-hand figure below. The left-hand figure below shows an expanded view of a 2S module.

Physics Analysis and Publications 

In recent years, my analysis interests have been focused on the rare decays of eta mesons, a topic that I am pursuing with post docs Bennett Greenberg and Andre Frankenthal (now a faculty member at US Irvine).   Prior to that, I worked on displaced Higgs decays resulting in final state tau pairs with postdocs Gage Dezoort and Alexis Kalogeropoulos, and searches for final states resulting in displaced jets with postdocs Andrez Zuranski and Jingyu Luo.    A list of selected publications can be found beneath the publications tab.