R. Maji

activity

20172026

most citedSuperheavy quasi-stable strings and walls bounded by strings in the light of NANOGrav 15 year data

74 citations · 489 across the 24 of their papers we have counts for

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24 papers · 1 filter

hep-ph2026

Monopoles, Strings, Walls and Gravitational waves

Rinku Maji, Qaisar Shafi

The gauge symmetry breaking $S U (2) \to U (1) \to Z_{2} \to 1$ successively produces monopoles, strings and domain walls bounded by strings (WBS), with the elementary monopole carrying…

hep-ph2026★ 2 cited

Magnetic monopoles and high frequency gravitational waves from quasi-stable strings

Rinku Maji, Qaisar Shafi

The spontaneous breaking of $S O (10)$ via flipped $S U (5)$ to the Standard Model yields a novel scenario in which the superheavy topologically stable GUT monopole carrying a single u…

hep-ph2025

Superconducting Strings in $E_{6}$

Rinku Maji, Qaisar Shafi

We discuss the appearance of superconducting strings in $E_{6}$ grand unification, keeping track of the magnetic monopole flux that precedes the formation of the string flux tube. Th…

hep-ph2025★ 1 cited

Cogenesis of baryon and lepton number asymmetries matching the EMPRESS Data

Kyu Jung Bae, Arghyajit Datta, Rinku Maji +1

We show that a simple supersymmetric $U (1)_{B - L}$ extension of the standard model can explain simultaneously the large electron neutrino asymmetry hinted by the recent EMPRESS data…

hep-ph2025★ 10 cited

Superheavy Metastable Strings in SO(10)

Rinku Maji, Qaisar Shafi

The spontaneous breaking of $S O (10)$ grand unified symmetry to $S U (3)_{c} \times S U (2)_{L} \times U (1)_{Y} \times U (1)_{χ}$ yields the GUT monopole as well as a comparably heavy $U (1)_{χ}$ m…

hep-ph2025★ 8 cited

C-parity, magnetic monopoles and higher frequency gravitational waves

Rinku Maji, Qaisar Shafi

We consider the spontaneous breaking of $S O (10)$ grand unified symmetry to the left-right symmetric model $S U (3)_{c} \times S U (3)_{L} \times S U (2)_{R} \times U (1)_{B - L}$ with C-parity al…

hep-ph2024

Induced gravitational waves, metastable cosmic strings and primordial black holes in GUTs

Rinku Maji, Ahmad Moursy, Qaisar Shafi

We explore the cosmological and astrophysical implications of a realistic hybrid inflation model based on flipped $S U (5)$ . The model contains superheavy metastable cosmic strings a…

hep-ph2024★ 10 cited

Kinetic Mixing, Proton Decay and Gravitational Waves in SO(10)

Rinku Maji, Qaisar Shafi

We present an $S O (10)$ model in which a dimension five operator induces kinetic mixing at the GUT scale between the abelian subgroups $U (1)_{B - L}$ and $U (1)_{R}$ . We discuss in this…

hep-ph2024★ 13 cited

Topological structures, dark matter and gravitational waves in $E_{6}$

Rinku Maji, Qaisar Shafi, Amit Tiwari

We discuss the appearance of topological structures from the spontaneous breaking of $E_{6}$ to the Standard Model via its maximal subgroup $S O (10) \times U (1)_{ψ}$ . They include dumbb…

hep-ph2024★ 13 cited

Quantum tunneling in the early universe: Stable magnetic monopoles from metastable cosmic strings

George Lazarides, Rinku Maji, Qaisar Shafi

We present a novel mechanism for producing topologically stable monopoles (TSMs) from the quantum mechanical decay of metastable cosmic strings in the early universe. In an $SO(10)…

hep-ph2023★ 8 cited

Supersymmetric $U (1)_{B - L}$ flat direction and NANOGrav 15 year data

Rinku Maji, Wan-Il Park

We show that, when connected with monopoles, the flat $D$ -flat direction breaking the local $U (1)_{B - L}$ symmetry as an extension of the minimal supersymmetric standard model can b…

hep-ph2023★ 32 cited

Inflation, superheavy metastable strings and gravitational waves in non-supersymmetric flipped SU(5)

George Lazarides, Rinku Maji, Ahmad Moursy +1

Motivated by the NANOGrav 15 year data and other recent investigations of stochastic gravitational background radiation based on pulsar timing arrays, we show how superheavy string…

hep-ph2023★ 74 cited

Superheavy quasi-stable strings and walls bounded by strings in the light of NANOGrav 15 year data

George Lazarides, Rinku Maji, Qaisar Shafi

Composite topological structures such as superheavy "quasi-stable strings" (QSS) and "walls bounded by strings" (WBS) arise in realistic extensions of the Standard Model of high en…

hep-ph2023★ 21 cited

Gravitational waves from walls bounded by strings in $S O (10)$ model of pseudo-Goldstone dark matter

Rinku Maji, Wan-Il Park, Qaisar Shafi

We explore the gravitational wave spectrum generated by string-wall structures in an $S O (10)$ ( $S p in (10)$ ) based scenario of pseudo-Goldstone boson dark matter (pGDM) particle. Thi…

hep-ph2022★ 21 cited

A Predictive $S O (10)$ Model

George Lazarides, Rinku Maji, Rishav Roshan +1

We discuss some testable predictions of a non-supersymmetric $S O (10)$ model supplemented by a Peccei-Quinn symmetry. We utilize a symmetry breaking pattern of $S O (10)$ that yields…

hep-ph2022★ 28 cited

Monopoles, Strings and Gravitational Waves in Non-minimal Inflation

Rinku Maji, Qaisar Shafi

We discuss how in $S O (10)$ grand unification an observable number density of topologically stable intermediate mass ( $\sim 1 0^{14}$ GeV) monopoles survive inflation driven by a Co…

hep-ph2022★ 22 cited

Heavier $W$ boson, dark matter and gravitational waves from strings in an $S O (10)$ axion model

George Lazarides, Rinku Maji, Rishav Roshan +1

Inspired by the recent determination of the $W$ -boson mass by the CDF collaboration, we revisit an $S O (10)$ axion model in which a scalar $S U (2)_{L}$ triplet field with zero hypercha…

hep-ph2022★ 31 cited

Gravitational Waves from Quasi-stable Strings

George Lazarides, Rinku Maji, Qaisar Shafi

We estimate the stochastic gravitational wave spectrum emitted from a network of cosmic strings in which the latter are effectively stable against breaking by monopole pair creatio…

hep-ph2021★ 40 cited

Cosmic Strings, Inflation, and Gravity Waves

George Lazarides, Rinku Maji, Qaisar Shafi

We investigate the impact of Coleman-Weinberg inflation on the stochastic gravity wave background spectrum emitted by intermediate scale cosmic strings. The string network is parti…

hep-ph2020★ 44 cited

Primordial Monopoles and Strings, Inflation, and Gravity Waves

Joydeep Chakrabortty, George Lazarides, Rinku Maji +1

We consider magnetic monopoles and strings that appear in non-supersymmetric $S O (10)$ and $E_{6}$ grand unified models paying attention to gauge coupling unification and proton decay…

hep-ph2019★ 2 cited

The E6 route to multicomponent dark matter

Triparno Bandyopadhyay, Rinku Maji

We present a framework of dark- and visible-sector unification in the E6 embedding of the standard model. The demand for consistently getting the standard model leads to the existe…

hep-ph2019★ 64 cited

Unification, Proton Decay and Topological Defects in non-SUSY GUTs with Thresholds

Joydeep Chakrabortty, Stephen F. King, Rinku Maji

We calculate the proton lifetime and discuss topological defects in a wide class of non-supersymmetric (non-SUSY) $S O (10)$ and $E (6)$ Grand Unified Theories (GUTs), broken via left…

hep-ph2017★ 45 cited

Roadmap of left-right models based on GUTs

Joydeep Chakrabortty, Rinku Maji, Subhendra Mohanty +2

We perform a detailed study of the grand unified theories $S O (10)$ and $E (6)$ with left-right intermediate gauge symmetries of the form $S U (N)_{L} \otimes S U (N)_{R} \otimes G$ …

hep-ph2017

Cut and compute: Quick cascades with multiple amplitudes

Joydeep Chakrabortty, Anirban Kundu, Rinku Maji +1

In an earlier paper we have proposed a novel method to compute the decay width for a general $1 \to n$ cascade decay where the propagators are off-shell and may be of different spin…

Monopoles, Strings, Walls and Gravitational waves

Magnetic monopoles and high frequency gravitational waves from quasi-stable strings

Superconducting Strings in E6​

Cogenesis of baryon and lepton number asymmetries matching the EMPRESS Data

Superheavy Metastable Strings in SO(10)

C-parity, magnetic monopoles and higher frequency gravitational waves

Induced gravitational waves, metastable cosmic strings and primordial black holes in GUTs

Kinetic Mixing, Proton Decay and Gravitational Waves in SO(10)

Topological structures, dark matter and gravitational waves in E6​

Quantum tunneling in the early universe: Stable magnetic monopoles from metastable cosmic strings

Supersymmetric U(1)B−L​ flat direction and NANOGrav 15 year data

Inflation, superheavy metastable strings and gravitational waves in non-supersymmetric flipped SU(5)

Superheavy quasi-stable strings and walls bounded by strings in the light of NANOGrav 15 year data

Gravitational waves from walls bounded by strings in SO(10) model of pseudo-Goldstone dark matter

A Predictive SO(10) Model

Monopoles, Strings and Gravitational Waves in Non-minimal Inflation

Heavier W boson, dark matter and gravitational waves from strings in an SO(10) axion model

Gravitational Waves from Quasi-stable Strings

Cosmic Strings, Inflation, and Gravity Waves

Primordial Monopoles and Strings, Inflation, and Gravity Waves

The E6 route to multicomponent dark matter

Unification, Proton Decay and Topological Defects in non-SUSY GUTs with Thresholds

Roadmap of left-right models based on GUTs

Cut and compute: Quick cascades with multiple amplitudes

Superconducting Strings in $E_{6}$

Topological structures, dark matter and gravitational waves in $E_{6}$

Supersymmetric $U (1)_{B - L}$ flat direction and NANOGrav 15 year data

Gravitational waves from walls bounded by strings in $S O (10)$ model of pseudo-Goldstone dark matter

A Predictive $S O (10)$ Model

Heavier $W$ boson, dark matter and gravitational waves from strings in an $S O (10)$ axion model