Using linear gluon polarization inside an unpolarized proton to determine the Higgs spin and parity

Gluons inside an unpolarized proton are in general linearly polarized in the direction of their transverse momentum, rendering the LHC effectively a polarized gluon collider. This polarization can be utilized in the determination of the spin and parity of the newly found Higgs-like boson. We focus here on the determination of the spin using the azimuthal Collins-Soper angle $\phi$ distribution.Comment: 6 pages, to appear in the proceedings of the LightCone 2013+ workshop, 20-24 May 2013, Skiathos, Greec

TMD evolution and the Higgs transverse momentum distribution

The effect of the linear polarization of gluons on the transverse momentum distribution in Higgs production is studied within the framework of TMD factorization. For this purpose we consider the TMD evolution for general colorless scalar boson production, from the lower mass $C$-even scalar quarkonium states $\chi_{c0}$ and $\chi_{b0}$ to the Higgs mass scale. In the absence of an intrinsic nonperturbative linearly polarized gluon distribution the results correspond to the CSS formalism, indicating a rather rapid decrease with increasing energy scale. At the Higgs mass scale the contribution from linearly polarized gluons is in this case found to be on the percent level, somewhat larger than an earlier finding in the literature. At the lower mass scale of quarkonium states $\chi_{c0}$ and $\chi_{b0}$ we find contributions at the 15-70% level, albeit with considerable uncertainty. In the presence of an intrinsic linear gluon polarization, percent level effects are also found at the Higgs mass scale, but with a considerably slower evolution. Although these results were obtained using a model for the TMDs that are approximately Gaussian at small transverse momenta and have the correct perturbative power law fall off at large transverse momenta, it illustrates well the differences that can exist between results obtained from a TMD formalism as compared to a CSS formalism. The behavior of the TMDs at small $p_T$ can affect the results for all transverse momenta of the produced boson, even for a particle as heavy as the Higgs. The TMD evolution from $\chi_{c0}$ to $\chi_{b0}$ may be used to constrain the nonperturbative contributions and improve on the prediction of the effect at the Higgs mass scale.Comment: 12 pages, 5 figures, minor additions, matches version accepted for publication in Nuclear Physics

A goal-oriented requirements modelling language for enterprise architecture

Methods for enterprise architecture, such as TOGAF, acknowledge the importance of requirements engineering in the development of enterprise architectures. Modelling support is needed to specify, document, communicate and reason about goals and requirements. Current modelling techniques for enterprise architecture focus on the products, services, processes and applications of an enterprise. In addition, techniques may be provided to describe structured requirements lists and use cases. Little support is available however for modelling the underlying motivation of enterprise architectures in terms of stakeholder concerns and the high-level goals that address these concerns. This paper describes a language that supports the modelling of this motivation. The definition of the language is based on existing work on high-level goal and requirements modelling and is aligned with an existing standard for enterprise modelling: the ArchiMate language. Furthermore, the paper illustrates how enterprise architecture can benefit from analysis techniques in the requirements domain

Big Brother Is Watching: When Should Georgia Get Involved In Issues of Family Privacy to Protect Children’s Liberties?

Alecia Faith Pennington (Faith) did not officially exist until she was nineteen. Faith’s conservative, religious parents, Lisa and James, raised their nine children on the family farm just outside Kerrville, Texas, and kept their family as self-sufficient and separate from the rest of the world as possible. The family was very insular; the parents home schooled all of the children, and the family rarely left their home, with the rare exception of going to church. Lisa and James also prohibited their children from using the Internet until they were eighteen, at which point they were only allowed limited access to websites their parents deemed safe and appropriate. According to Faith, her parents created this closed-off world for their children because they wanted to keep “sinful” things away from their kids. The children were not allowed to argue with their parents, and they grew up dutifully obeying this rule. Faith, the fourth-born child describes herself as more “stubborn” and “free-spirited” than her siblings. When she was eighteen, she decided she and her siblings had “no future” and that she needed to get away. She used her WiFi compatible iPod to text her grandparents and ask them to take her home with them the next time they came to visit the farm. A week later, Faith became the first Pennington child to disobey her parents and leave home. Faith said she found the strength to leave because she “knew it was the right thing to do” and because she needed to take control of her own life. Once she gained exposure to life outside the Pennington farm, Faith wanted to assimilate. However, her upbringing had affected not only her social ability to blend in with her peers but also her legal ability to do so. Lisa Pennington gave birth to all of her children at home, and she and James intentionally chose midwives who agreed not to file records of the children’s births. As a result, Faith and her siblings did not have birth certificates or Social Security numbers. The Pennington children had never been to a hospital, seen a doctor, or been enrolled in formal school, so there was no public record of their existence. Faith’s parents’ decision not to report their children’s births left Faith and her eight siblings without any legal identity and invisible to local, state, and federal governments. This lack of legal identity left them unable to get a driver’s license, get a job, attend college, or vote. Although Faith’s case is unique, it raises broader state and federal law questions because procedures do not exist to resolve similar issues in which parents’ right to make choices for their children directly conflicts with those children’s current and future interests. This Note seeks to explore and analyze the balance between children’s rights and parental autonomy and to propose a plan for Georgia courts to provide clarity on this issue of parental decisions infringing upon children’s liberties. Part I of this Note provides an overview of the legal issues in Faith’s case, current law relating to children’s rights, the broader philosophical concept of parents’ obligation to preserve an “open future” for their children, and issues of family privacy. Part II examines cases and examples of clashes between family autonomy and children’s rights, as well as state legislation passed in an attempt to provide guidance in solving this problem. Finally, Part III contains a proposal for Georgia courts to address the imbalance between parental and child autonomy

Realizing Traceability between the Enterprise Architecture and Business Value

An enterprise architecture (EA) is a high-level representation of the enterprise. An EA is designed to realize the business value of an organization. In the first part of this thesis a traceability relation between the EA, modeled with ArchiMate, and the business goals is defined and empirically evaluated. Afterwards the language is validated with practitioners and academics in terms of understandability. The conclusion is that the concepts of this modeling language are difficult to understand because the concepts are too closely related. We end this part with a simplification of the goal-modeling language.In the second part a traceability relation between two conceptual modeling languages, e3value and ArchiMate, is designed. This traceability relation is refined in an experiment with practitioners and evaluated in a case study. A key finding from this case study is that for the traceability to be useful, the quantifications of an e3value model have to be aligned with those in an ArchiMate model. The thesis ends with a quantitative alignment of an ArchiMate model with the quantifications of an e3value model. <br/

Hybrid stabilizing control on a real mobile robot

To establish empirical verification of a stabilizing controller for nonholonomic systems, the authors implement a hybrid control concept on a 2-DOF mobile robot. Practical issues of velocity control are also addressed through a velocity controller which transforms the mobile robot to a new system with linear and angular velocity inputs. Experiments in the physical meaning of different controller components provide insights which result in significant improvements in controller performanc