Publications (58)
Scalar Potentials and Accidental Symmetries in Supersymmetric U(1)' Models
Paul Langacker, Gil Paz, Itay Yavin
We address two closely related problems associated with the singlet scalars' potential that are often present in supersymmetric U(1)' models, especially those which maintain the ga…
Proposal for a Precision Measurement of |Vub|
Stefan W. Bosch, Bjorn O. Lange, Matthias Neubert +1
A new method for a precision measurement of the CKM matrix element |Vub| is discussed, which combines good theoretical control with high efficiency and a powerful discrimination ag…
A two-loop relation between inclusive radiative and semileptonic B-decay spectra
Bjorn O. Lange, Matthias Neubert, Gil Paz
A shape-function independent relation is derived between the partial B->X_u+l+nu decay rate with a cut on P_+=E_X-P_X<Delta and a weighted integral over the normalized B->X_s+gamma…
Nucleon spin-averaged forward virtual Compton tensor at large
Richard J. Hill, Gil Paz
The nucleon spin-averaged forward virtual Compton tensor determines important physical quantities such as electromagnetically-induced mass differences of nucleons, and two-photon e…
Model Independent Analysis of the Proton Magnetic Radius
Joydeep Roy, Zachary Epstein, Gil Paz
The proton is a fundamental constituent of matter. It is an extended object with finite size that can be inferred with some degree of accuracy from several measurements. Using cons…
Bubble Chamber Detectors with Light Nuclear Targets: A Snowmass 2021 White Paper
Luis Alvarez-Ruso, Joshua L. Barrow, Leo Bellantoni +29
Neutrino cross sections are a critical ingredient in experiments that depend on neutrino scattering to reconstruct event kinematics and infer neutrino characteristics, like NOvA an…
Radiative Corrections: From Medium to High Energy Experiments
Andrei Afanasev, Jan C. Bernauer, Peter Blunden +16
Radiative corrections are crucial for modern high-precision physics experiments, and are an area of active research in the experimental and theoretical community. Here we provide a…
The Charge Radius of the Proton
Gil Paz
Recently, the charge radius of the proton was extracted for the first time from muonic hydrogen. The value obtained is five standard deviations away from similar measurements of re…
The non-self-adjointness of the radial momentum operator in n dimensions
Gil Paz
The non self-adjointness of the radial momentum operator has been noted before by several authors, but the various proofs are incorrect. We give a rigorous proof that the -dimen…
Quasielastic Lepton-Nucleus Scattering and the Correlated Fermi Gas Model
Bhubanjyoti Bhattacharya, Sam Carey, Erez O. Cohen +1
The neutrino research program in the coming decades will require improved precision. A major source of uncertainty is the interaction of neutrinos with nuclei that serve as targets…
Long-Distance Dominance of the CP Asymmetry in B->X_{s,d}+gamma Decays
Michael Benzke, Seung J. Lee, Matthias Neubert +1
We show that in the Standard Model the parametrically leading (by a factor 1/alpha_s) contribution to the inclusive CP asymmetry in B->X_{s,d}+gamma decays arises from a long-dista…
Theory of Inclusive Radiative B Decays: 2012 Update
Gil Paz
This talk discusses recent developments in the theory of inclusive radiative B decays, focusing mainly on non-perturbative aspects of the CP asymmetry in B->Xs gamma.
A T-odd observable sensitive to CP violating phases in squark decay
Paul Langacker, Gil Paz, Lian-Tao Wang +1
We present a new observable sensitive to a certain combination of CP violating phases in supersymmetric extensions of the Standard Model, viz. a triple product of momenta in the ca…
Reevaluating Uncertainties in Decay
Ayesh Gunawardana, Gil Paz
The rare decay is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved pho…
Reply to Comment [arXiv:1708.09341] by Birse and McGovern on "Nucleon spin-averaged forward virtual Compton tensor at large "
Richard J. Hill, Gil Paz
We reply to misleading claims made in a comment to our work by Birse and McGovern in arXiv:1708.09341.
Model Independent Extraction of the Proton Charge Radius from PRad data
Gil Paz
The proton radius puzzle has motivated several new experiments that aim to extract the proton charge radius and resolve the puzzle. Recently PRad, a new electron-proton scattering…
Effective Field Theory Perspective On King Non-linearity
Benoît Assi, Sam Carey, Sebastian Jäger +4
Precision spectroscopic measurements of isotope shifts have recently reached a high level of accuracy. Tests of King non-linearity (NL) along isotope chains have been proposed as a…
Factorization at Subleading Power and Irreducible Uncertainties in Decay
Michael Benzke, Seung J. Lee, Matthias Neubert +1
Using methods from soft-collinear and heavy-quark effective theory, a systematic factorization analysis is performed for the photon spectrum in the endpoint regio…
Model independent analysis of proton structure for hydrogenic bound states
Richard J. Hill, Gil Paz
Proton structure effects in hydrogenic bound states are analyzed using nonrelativistic QED effective field theory. Implications for the Lamb shift in muonic hydrogen are discussed.…
The NRQED lagrangian at order 1/M^4
Richard J. Hill, Gabriel Lee, Gil Paz +1
The parity and time-reversal invariant effective lagrangian for a heavy fermion interacting with an abelian gauge field, i.e., NRQED, is constructed through order . The impl…
Neutrino Scattering Measurements on Hydrogen and Deuterium: A Snowmass White Paper
Luis Alvarez-Ruso, Joshua L. Barrow, Leo Bellantoni +30
Neutrino interaction uncertainties are a limiting factor in current and next-generation experiments probing the fundamental physics of neutrinos, a unique window on physics beyond…
Subleading Shape Functions in Inclusive B Decays
Stefan W. Bosch, Matthias Neubert, Gil Paz
The contributions of subleading shape functions to inclusive decay distributions of B mesons are derived from a systematic two-step matching of QCD current correlators onto soft-co…
On the sensitivity of nuclear clocks to new physics
Andrea Caputo, Doron Gazit, Hans-Werner Hammer +4
The recent demonstration of laser excitation of the eV isomeric state of Thorium-229 is a significant step towards a nuclear clock. The low excitation energy likely res…
Shining dark matter in Xenon1T
Gil Paz, Alexey A. Petrov, Michele Tammaro +1
We point out that a non-relativistic GeV dark matter (DM) which interacts with visible matter through higher dimensional Rayleigh operators could explain the excess of "e…
The flavor of a little Higgs with T-parity
Jay Hubisz, Seung J. Lee, Gil Paz
We analyze flavor constraints in the littlest Higgs model with T-parity. In particular, we focus on neutral meson mixing in the K, B, and D systems due to one loop contributions fr…
Model independent determination of the axial mass parameter in quasielastic neutrino-nucleon scattering
Bhubanjyoti Bhattacharya, Richard J. Hill, Gil Paz
Quasielastic neutrino-nucleon scattering is a basic signal process for neutrino oscillation studies. At accelerator energies, the corresponding cross section is subject to signific…
Oscillating nuclear charge radii as sensors for ultralight dark matter
Abhishek Banerjee, Dmitry Budker, Melina Filzinger +5
We show that coupling of ultralight dark matter (UDM) to quarks and gluons would lead to an oscillation of the nuclear charge radius for both the quantum chromodynamics (QCD) axion…
Summary of Workshop on Common Neutrino Event Generator Tools
Josh Barrow, Minerba Betancourt, Linda Cremonesi +20
A neutrino community workshop was held at Fermilab in Jan 2020, with the aim of developing an implementation plan for a set of common interfaces to Neutrino Event Generators. This…
Enhanced neutrino polarizability
Saurabh Bansal, Gil Paz, Alexey Petrov +2
We point out that neutrinos can have enhanced couplings to photons, if light (pseudo)scalar mediators are present, resulting in potentially measurable neutrino polarizability. We s…
An Effective Field Theory Look at Deep Inelastic Scattering
Gil Paz
This talk discusses the effective field theory view of deep inelastic scattering. In such an approach, the standard factorization formula of a hard coefficient multiplied by a part…
Recent developments in HQET
Gil Paz
In this talk we review recent perturbative and non-perturbative developments in Heavy Quark Effective Theory (HQET).
On HQET and NRQCD Operators of Dimension 8 and Above
Ayesh Gunawardana, Gil Paz
Effective field theories such as Heavy Quark Effective Theory (HQET) and Non Relativistic Quantum Chromo-(Electro-) dynamics NRQCD (NRQED) are indispensable tools in controlling th…
Theory of Inclusive B Decays
Gil Paz
In this talk I briefly review the current status of the theory of the inclusive decays: , , and $\bar B\to…
Combining Anomaly and Z' Mediation of Supersymmetry Breaking
Jorge de Blas, Paul Langacker, Gil Paz +1
We propose a scenario in which the supersymmetry breaking effect mediated by an additional U(1)' is comparable with that of anomaly mediation. We argue that such a scenario can be…
Higher dimensional HQET parameters
Gil Paz
Effective field theories such as Heavy Quark Effective Theory (HQET) are indispensable tools in controlling the effects of the strong interaction. The increasing experimental preci…
Remarks on the Z' Drell-Yan cross section
Gil Paz, Joydeep Roy
Many extension of the standard model contain an extra U(1)' gauge group with a heavy Z' gauge boson. Perhaps the most clear signal for such a Z' would be a resonance in the invaria…
Enhanced Non-local Power Corrections to the B->X_s+gamma Decay Rate
Seung J. Lee, Matthias Neubert, Gil Paz
A new class of enhanced non-perturbative corrections to the inclusive B->X_s+gamma decay rate is identified, which contribute first at order Lambda/m_b in the heavy-quark expansion…
From A to Z': Combining Anomaly and Z' Mediation of Supersymmetry Breaking
Gil Paz
Combining anomaly with Z' mediation allows us to solve the tachyonic slepton problem of the former and avoid fine tuning in the latter. We describe how the two mechanisms can be co…
Model independent extraction of the proton charge radius from electron scattering
Richard J. Hill, Gil Paz
Constraints from analyticity are combined with experimental electron-proton scattering data to determine the proton charge radius. In contrast to previous determinations, we provid…
Subleading Jet Functions in Inclusive B Decays
Gil Paz
The contribution of subleading jet functions to inclusive decay distributions of mesons are derived from a systematic two-step matching of QCD current correlators onto soft col…
Aspects of Z'-mediated Supersymmetry Breaking
Paul Langacker, Gil Paz, Lian-Tao Wang +1
In a recent paper, we proposed the possibility that supersymmetry breaking is communicated dominantly via a U(1)' vector multiplet. We also required that the U(1)' plays a crucial…
Theory of radiative B decays
Gil Paz
This talk discusses the theory of inclusive and exclusive radiative B decays, emphasizing the interplay of perturbative and non-perturbative effects and the importance CP and isosp…
Direct CP Asymmetry in B->X_{s,d}+gamma Decays
Gil Paz
The CP asymmetry in inclusive B->X_{s,d}+gamma decays is an important probe of new physics. The theoretical prediction was thought to be of a perturbative origin, and in the standa…
Searching for neutrino polarizability at DUNE
Sam Carey, Pedro Machado, Gil Paz +4
We perform an initial study of DUNE's sensitivity to enhanced neutrino polarizability within models of light scalar mediators. We identify two possible signatures of polarizability…
Model independent extraction of the proton magnetic radius from electron scattering
Zachary Epstein, Gil Paz, Joydeep Roy
We combine constraints from analyticity with experimental electron-proton scattering data to determine the proton magnetic radius without model-dependent assumptions on the shape o…
Charmless inclusive B decays and the extraction of V(ub)
Gil Paz
This work discusses charmless inclusive B decays and their application to the extraction of . Starting from first principles we relate the differential decay rate to the…
SU(3) - Flavor Symmetry in Decays
Gil Paz
In the framework of SU(3) symmetry, we present a general analysis of meson decays into two lighter uncharmed mesons (both pairs of pseudoscalar mesons and pairs of vector and p…
Precision Determination of
Gil Paz
The last two years have seen an impressive improvement in the determination of , especially from inclusive decays. The error on measured with inclusive decays…
An Introduction to NRQED
Gil Paz
We present a pedagogical introduction to NRQED (non-relativistic quantum electrodynamics). NRQED is an effective field theory that describes the interaction of non-relativistic, po…
Model-independent determination of the axial mass parameter in quasielastic antineutrino-nucleon scattering
Bhubanjyoti Bhattacharya, Gil Paz, Anthony J. Tropiano
Understanding the charged current quasielestic (CCQE) neutrino-nucleus interaction is important for precision studies of neutrino oscillations. The theoretical description of the i…
Theory of Charmless Inclusive B Decays and the Extraction of V_{ub}
Bjorn O. Lange, Matthias Neubert, Gil Paz
We present ``state-of-the-art'' theoretical expressions for the triple differential B->X_u l^- nu decay rate and for the B->X_s gamma photon spectrum, which incorporate all known c…
Theory of Inclusive Radiative B Decays
Gil Paz
This talk discusses recent developments in the theory of inclusive radiative B decays, focusing mainly on non-perturbative aspects of B->Xs gamma.
Quasielastic Lepton-Nucleus Scattering and the Correlated Fermi Gas Model
Gil Paz
The future neutrino research program will require improved precision. A major source of uncertainty is the interaction of neutrinos with nuclei that serve as targets for such exper…
On the connection between the radial momentum operator and the Hamiltonian in n dimensions
Gil Paz
The radial momentum operator in quantum mechanics is usually obtained through canonical quantization of the (symmetrical form of the) classical radial momentum. We show that the we…
Elements of QED-NRQED Effective Field Theory: I. NLO scattering at leading power
Steven P. Dye, Matthew Gonderinger, Gil Paz
The proton radius puzzle, i.e. the large discrepancy in the extraction of the proton charge radius between regular and muonic hydrogen, challenges our understanding of the structur…
Z'-mediated Supersymmetry Breaking
Paul Langacker, Gil Paz, Lian-Tao Wang +1
We consider a class of models in which supersymmetry breaking is communicated dominantly via a U'(1) gauge interaction, which also helps solve the μproblem. Such models can emerge…
The Proton Radius Puzzle
Gil Paz
In 2010 the proton charge radius was extracted for the first time from muonic hydrogen, a bound state of a muon and a proton. The value obtained was five standard deviations away f…
Elements of QED-NRQED Effective Field Theory: II. Matching of Contact Interactions
Steven P. Dye, Matthew Gonderinger, Gil Paz
In 2010 the first extraction of the proton charge radius from muonic hydrogen was found be be five standard deviations away form the regular hydrogen value. Eight years later, this…